The two broad types of evolution occurring in this pathogen are allopatric speciation and adaptation by natural selection.
Allopatric speciation occurs when a population becomes geographically isolated and diverges genetically, leading to the formation of new species. In the case of the fungal pathogen, the different amphibian species act as geographic barriers, causing the pathogen to evolve specialized defenses against each amphibian species' immune system and leading to the formation of genetically distinct strains of the pathogen that are unable to interbreed.
Adaptation by natural selection occurs when individuals with certain traits are better suited to their environment and are therefore more likely to survive and reproduce.
In the case of the fungal pathogen, populations in different parts of the host's body are exposed to different environmental challenges and evolve uniquely to deal with these challenges. While these populations are still genetically similar enough to interbreed, they end up having very different phenotypes due to natural selection.
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TRUE or FALSE
Gircle T if the statement is TRUE.
Circle F if the statement is FALSE.
If it is FALSE, MAKE CORRECTIONS to the underlined word(s) to make the statement true.
Offspring from asexual-reproduction are genetically identical to the parent.
Polar bodies go on to become eggs.
The 2nd-division-in-meiosis is a mitosis division without copying the DNA 1.
In hnmans, meiosis occurs in the testes and ovaries.
Gametes produced in meiosis are identical to each other, but different from
the parent cell.
Answer:
1- TRUE
2-False, Polar bodies will usually die and disintegrate by apoptosis.
3- TRUE
4- TRUE
5- False- Gametes are not identical because recombination of alleles
Explanation:
In the islands he visited, Darwin found , but not species of finch?
In the islands he visited, Darwin found species of finch, but not the same species of finch on each island.
Darwin's observation of the variations in finch species across the Galapagos Islands was a crucial piece of evidence for his theory of evolution through natural selection. He noticed that the finches on each island had unique beak shapes and sizes that were well-suited to the specific food sources available on that island. For example, finches with longer, narrower beaks were able to feed on insects and other small prey, while finches with thicker, stronger beaks were better equipped to crack open hard seeds.
Darwin's observations of the finches, along with other species he encountered, led him to conclude that organisms evolve over time through a process of natural selection, in which those individuals with traits that are better suited to their environment are more likely to survive and reproduce.
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Oil spills are particularly devastating for organisms living on the ocean floor. A. True B. False
Answer: True
Explanation:
In the ocean, oil spills can be extremely harmful or deadly to all sorts of marine organisms, including those residing on the ocean floor.
The red-billed oxpecker (a bird) eats ticks off the fur of an impala (a type of antelope). The oxpecker receives food and removes the ticks from the impala
Is this parasitism mutualistic relationship or mutualism because the oxpecker acquired nourishment while picking the ticks off the impala? food as payment. In parasitism, one organism benefits whereas the other stays unaffected by the commensal relationship.
What is an oxpecker used for?The oxpecker keeps watch on the mammals it happens to be living on while also consuming ticks and many other external parasites. A hissing cry alerts its host to imminent danger when it is close by.
Why allows the giraffe to be followed by the oxpeckers?Giraffes and tickbirds, also known as red-billed and orange oxpeckers, coexist in harmony. The oxpeckers remove parasites and ticks from the giraffes, freeing them of blood-sucking, disorder parasites.
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Question 4
Which type of muscle is found in your digestive system?
Rectus abdominus
Cardiac muscle
Stomach muscles
Smooth muscle
PLSSSS HELP IF YOU TURLY KNOW THISSS
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A. All of the aboveExplanation:
This happens for the following reasons :-
Hydrogen bonds are again the key. The number of bonds between molecules determines whether water will be a solid, liquid, or gas. In the solid state, water molecules have the maximum number of hydrogen bonds (4 per molecule), giving water the rigid characteristic of ice.Hope it helps you :)Which organism is an example of an organism created with recombinant dna?
The organism which is an example of an organism created with recombinant DNA is corn with a gene from bacteria inserted into its genome. Option A.
Recombinant DNA molecules are described as DNA molecules produced using genetic recombination techniques used in laboratories to combine genetic material from various sources to produce sequences that wouldn't normally be present in the genome.
The gene is the centre of all genetics, and laboratory geneticists' primary objective is to identify, define, and modify genes.
It is a molecule derived from in vitro-created molecules or synthetic DNA that has undergone genetic modification to modify its characteristics.
In this sense, it is created by combining several DNA sequences from two distinct creatures, such as a DNA molecule from a bacteria that is modified in a lab and then transferred into another organism.
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Complete question:
Which organism is an example of an organism created with recombinant DNA?
A: corn with a gene from bacteria inserted into its genome
B: different dog breeds created by selecting for different traits
C: daisies with striped flowers created by pollinating two different daisy plants
D: potatoes cloned as exact copies of other potato plants
Which of Mendel's laws BEST explains why
genetic variations occur in offspring resulting
from sexual reproduction?
A law of segregation
B law of dominance
C law of independent assortment
D law of crossing-over
Due to the law of independent assortment, genetic variations occur in offspring resulting from sexual reproduction. So, option C is correct.
One of Mendel's rules of inheritance, the Law of Independent Assortment, explains how various genes segregate independently of one another throughout the development of gametes (eggs and sperm).
This law states that genes situated on distinct chromosomes are randomly arranged and passed down to offspring independently of one another. The inheritance of one gene does not affect the inheritance of another gene.
This indicates that during meiosis, the homologous chromosomes' haphazard alignment in metaphase I causes a random separation of various gene alleles into the gametes. As a result, many allele combinations might be produced in the progeny, increasing genetic diversity.
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The correct solution to this question here is option C. Law of independent assortment by Joseph Mendel.
The Law of Independent Assortment BEST explains why genetic variations occur in offspring resulting from sexual reproduction. The Law of Independent Assortment states that during meiosis, the alleles of different genes are randomly distributed into gametes. This means that different combinations of alleles can end up in different gametes, which can lead to a wide variety of genetic combinations in the offspring. This can result in a diverse set of traits and characteristics in the offspring, even among siblings.
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In celery the leaves can be curly or straight, curly is dominant over recessive. LL = curly , ll= straight. The other trait is spot on the leaves. Dark greens spots are dominant over white spots. Use GG for dark green, and gg for white. This is a dibybrid cross. Cross two heterozygous plants
9:3:3:1 is the predicted phenotypic number (curly with dark green spots: curly with white spots: straight with dark green spots: straight with white spots).
To perform a dihybrid cross, we need to consider both traits separately. Let's represent one parent plant as LlGg (curly with dark green spots) and the other parent plant as LlGg (curly with dark green spots).
To determine the possible offspring, we need to create a Punnett square by crossing the alleles for each trait.
First, let's focus on the curly/straight leaves trait. The Ll parent can produce L or l gametes, and the other parent can produce L or l gametes as well. We can write these gametes on the top and side of the Punnett square, respectively.
Copy code
L l
L LL Ll
l Ll ll
Next, we can focus on the dark green/white spot trait. The Gg parent can produce G or g gametes, and the other parent can produce G or g gametes as well. We can write these gametes on the top and side of the Punnett square, respectively.
Copy code
G g
G GG Gg
g Gg gg
Now, we can combine the two traits in the Punnett square by multiplying the possible gametes.
Copy code
LG Lg lG lg
GG LLGG LLGg LlGG LlGg
Gg LLGg LLgg LlGg Llgg
g LlGG LlGg llGG llGg
gg LlGg Llgg llGg llgg
We can see that there are 16 possible combinations of alleles in the offspring. To determine the phenotype of each offspring, we can use the rules of dominance.
In this case, curly (L) is dominant over straight (l) and dark green spots (G) are dominant over white spots (g). Therefore, any plant with at least one L allele will have curly leaves, and any plant with at least one G allele will have dark green spots.
The possible phenotypes for the offspring are:
9 curly with dark green spots (LLGG, LLGg, LlGG, LlGg)
3 curly with white spots (LLgg, Llgg, Llgg)
3 straight with dark green spots (llGG, llGg, llgG)
1 straight with white spots (llgg)
Therefore, the expected phenotypic ratio is 9:3:3:1 (curly with dark green spots: curly with white spots: straight with dark green spots: straight with white spots).
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the arrival time of the first earthquake p wave at a seismograph station was 10:11:20 if the epicenter of the earthquake is 8000 km away what is the approximate arrival time of the first s wave
The approximate arrival time of the first S wave at the seismograph station would be around 10:12:08 to 10:12:16.
What is the approximate arrival time of the first s wave?The S wave typically arrives after the P wave, and the time interval between the two waves depends on the distance between the seismograph station and the epicenter.
For every 1,000 km of distance, there is typically a delay of about 6-7 seconds between the arrival of the P wave and the S wave.
Since the epicenter of the earthquake is 8,000 km away, we can expect the S wave to arrive approximately 48-56 seconds after the P wave.
Therefore, the approximate arrival time of the first S wave at the seismograph station would be around 10:12:08 to 10:12:16.
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the dna fingerprints were made from blood samples taken from a puppy and four possible sires of this puppy in an effort to determine the puppy's pedigree. according to this information, which sire was probably the father of this puppy?
According to the information, the sire that matches the puppy's DNA fingerprints from the blood samples is probably the father of the puppy in pedigree analysis.
DNA fingerprinting using blood samples. DNA fingerprinting is used to determine the identity of an individual based on their genetic material. It's a process that entails comparing and contrasting genetic information from different samples.
To determine the puppy's pedigree, DNA fingerprints were made from blood samples obtained from a puppy and four potential sires of this particular puppy. The DNA fingerprints should be matched together for this purpose and the results should be analyzed and recorded for pedigree analysis.
Therefore, the identity of the sire that is most likely to be the father of the puppy can be discovered by matching the puppy's DNA fingerprint to each of the four possible sires' DNA fingerprints. As a result, by examining the DNA fingerprint patterns, it is feasible to determine the probable father of the puppy.
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why is it necessary to utilize probes for labeling particular dna sequences? how is this process accomplished? why must gel electrophoresis of human dna be followed by a southern blot
Answer: See Below
Explanation:
1. A probe will bind to a particular DNA sequence if it is present in a sample indicating its presence or absence.
2. Review southern blotting.
3. Southern blotting uses hybridization of a probe to a target sequence to identify if the target DNA is present.
Amy is only nine years old and her total cholesterol is 550 mg/dL. Why do you think her cholesterol is so much higher than the others in her family who have familial hypercholesterolemia?
answer: she is way much fatter that her family members
Explanation: she eat too much
Amy's cholesterol is so much higher than the others in her family who have familial hypercholesterolemia due to heredity.
Your bad cholesterol, or low-density lipoprotein (LDL), is too high in hypercholesterolemia, a lipid disorder. As a result, fat builds up in your arteries, known as atherosclerosis, increasing your risk of heart attack and stroke.
It is mostly brought on by smoking, being overweight, eating fatty foods, not exercising enough, and drinking alcohol. Additionally, it can run in families. By exercising more and eating well, you can lower your cholesterol.
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explain why these birds now have strong beaks, even though most of them did not have strong beaks many generations ago. be sure to include what you know about how individuals get their traits.amplify
The term 'strong beaks' is a feature, which refers to a beak capable of breaking solid objects, which many birds have, including finches. Darwin's finches are a group of birds that live on the Galapagos Islands and are known for their beaks' variability. Darwin noticed that finches with larger, harder beaks were better at cracking nuts than finches with smaller beaks.
The birds that were capable of breaking more robust nuts were more successful in terms of survival and reproduction in their particular environment. The birds that could survive reproduced and passed their beak characteristics to their descendants.
So, over the course of many generations, the beaks of the finches began to change. Those with larger, stronger beaks were more likely to pass on their traits, while those with weaker, smaller beaks were less successful at survival and reproduction.
Therefore, those finches that inherited strong beaks survived and reproduced, thus passing on their traits to the next generation, whereas those with weaker beaks would not have had the same success rates. This process of natural selection over many generations led to the evolution of stronger beaks in many bird species.
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Describe how sea-level air temperature and average snowfall affects the size
of a glacier
Answer:
As long as snow accumulation equals or is greater than melt and ablation, a glacier will remain in balance or even grow. Once winter snowfall decreases, or summer melt increases, the glacier will begin to retreat.
Explanation:
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The closest common ancestor of Trilobita and Chelicerata is ___________________.
The closest common ancestor of Trilobita and Chelicerata is believed to be a primitive arthropod that lived around 600 million years ago, during the Cambrian period.
What is closest common ancestor ?closest common ancestor is referred to any ancient animal whose DNA marking are derived to be the same with the specimen of the animal being tested .
This ancestral arthropod is sometimes referred to as the "urarthropod" or "stem arthropod," and it is thought to have given rise to a diverse array of arthropod groups, including the trilobites and chelicerates. While the exact nature of this ancestral arthropod is still uncertain, scientists have been able to glean some information about its appearance and behavior based on fossil evidence and comparisons with living
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Which of the following statements describes peristalsis the best?
Responses
muscles contract and relax in your esophagus involuntarily to move food to your stomach
muscles contract and relax in your esophagus involuntarily to move food to your stomach
contractions of the muscle in your esophagus that we must think about to achieve
contractions of the muscle in your esophagus that we must think about to achieve
muscles contract and relax in your mouth to move food into a bolus
muscles contract and relax in your mouth to move food into a bolus
your food waste breaks down into its simplest parts in your small intestine
The statement "muscles contract and relax in your esophagus involuntarily to move food to your stomach" describes peristalsis the best.
What is peristalsis?Peristalsis is the coordinated contraction and relaxation of the muscles in the walls of the digestive tract, which helps to move food and other material through the digestive system.
This involuntary muscular action propels the contents of the digestive tract forward, from the esophagus to the anus. Peristalsis is an important part of the digestive process, allowing the body to break down and absorb nutrients from food and eliminate waste products.
Peristalsis is controlled by the enteric nervous system, a complex network of neurons that is sometimes referred to as the "second brain" because it can function independently of the central nervous system.
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Organisms like the volvox that reproduce asexually tend to have almost no genetic diversity within the gene pool of a population. Which of the following claims about the genetics of the
best supports this statement?
Asexual reproduction produces a genetic duplicate of the parent organism (a clone).
What is Asexual reproduction?Unlike sexual reproduction, asexual reproduction only adds genetic variation to the population if a random mutation in the organism's DNA is passed on to the progeny.
Mutation is the only source of variation for asexual animals. Mutations that arise during the formation of germ cell lines are the ultimate source of variation in sexually reproducing organisms.
Genetic variation causes trait variation. Because genetic diversity is vital to a species' survival, all living animals have some mechanism for imparting variability when they reproduce. The principal mechanism by which asexually reproducing organisms generate novel gene variations is mutation.
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Malaria is an illness caused by mosquitos. Individuals that carry either one or two of the sickle cell alleles are resistant to malaria. Which of the following genotypes would NOT be malaria resistant?
SS (dominant-dominant)
Ss (Dominant-recessive)
ss (recessive-recessive)
Answer:
SS (dominant-dominant)
Explanation:
The question is asking which will not be malaria resistant, after stating that those who carry at least one sickle cell allele is resistant to malaria. Sickle cell disease is a recessive condition (s), and therefore for it to be present, there must be no dominant trait. Therefore, ss (recessive-recessive) will have malaria resistance, as those with sickle cell alleles are resistant to malaria. Ss (Dominant-recessive) is already given to not be an answer, as it states that "one or two of the sickle cells alleles [carried by the individual] are resistant to malaria".
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gametes from two plant species combine and produce a haploid zygote, and that zygote develops into a haploid, hybrid plant. why is the hybrid plant sterile? select all that apply.
The hybrid plant is sterile due to several reasons. It is because the gametes from two plant species combine and produce a haploid zygote, and that zygote develops into a haploid, hybrid plant.
The following are the reasons why the hybrid plant is sterile:
1. Hybridization leads to the formation of a sterile hybrid plant: A hybrid plant is formed when two plants of different species mate, but the hybrid plant produced is sterile because the genetic makeup of the parents is incompatible.
2. Differences in chromosome numbers: The parents of the hybrid plant have different chromosome numbers, which can result in the hybrid plant having an odd number of chromosomes.
3. Meiosis is impaired: The hybrid plant's reproductive system is impaired, preventing it from producing functional gametes. Therefore, the hybrid plant cannot self-fertilize or cross-fertilize with either parent, resulting in infertility.
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What is the distal attachment of all three heads of the triceps brachii?
The distal attachment of all three heads of the triceps brachii is called as Olecranon that be expressed with the option D.
The big, thick muscle on the ventral side of the upper arm is called the biceps brachii (BB), sometimes known as the biceps.
A small head and a long head make up the muscle. The medial side of the biceps brachii has the short head, whereas the lateral side has the long head.
The biceps brachii can produce motions in the glenohumeral, elbow, and radio-ulnar joints and operates across three joints.
The olecranon is a broad, thick, curving bony prominence of the ulna, a long bone in the forearm that extends behind the elbow (/olkrnn/; from Greek olene "elbow" and kranon "head"). It is located across from the cubital fossa, or elbow pit, and makes up the most pointed area of the elbow. The extensor muscles, which straighten the elbow joint, use the olecranon as a lever.
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Complete question:
What is the distal attachment of all three heads of the triceps brachii? Multiple Choice
Tuberosity of radiusCorcold process Coronoid process OlecranonUse evidence in the last sections of the text and your understanding of photosynthesis and cellular respiration, present an argument for the coevolution of life and Earth's other systems (atmosphere, biosphere, geosphere).
Need:
Claim (statement) (5 pts)
Evidence to support your claim (10 pts)
Justification (how do you know your evidence is accurate?) (10 pts)
Life and Earth's other systems have coevolved together over billions of years.
What is Life?Life is the existence of individual organisms. It is a process of self-sustaining and self-replicating systems that are made up of complex chemical and biological components. Living organisms interact with their environment, having the ability to grow, reproduce, and adapt to their environment.
Evidence: Photosynthesis and cellular respiration are two of the most important processes responsible for the evolution of life on Earth. Photosynthesis is responsible for capturing energy from the sun and converting it into organic molecules that can be used by organisms.
Justification: Photosynthesis and cellular respiration are well-documented processes that are essential for life on Earth, and have been studied extensively. It is clear that these processes have been integral in the development of the atmosphere, biosphere, and geosphere over billions of years, and therefore have had an impact on the evolution of life on Earth.
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in which direction do the peristaltic contractions of the stomach's smooth muscle move contents from the body to the fundic region from the pyloric region to the fundic region
To move its contents from the fundus to the pyloric region, the stomach's smooth muscle contracts peristaltically. The one that makes the greatest sense is "e. none of them above".
The fundus is the most proximal portion of the stomach, and the gastric cardia is its most distal component.
A series of wave-like muscular contractions known as peristalsis is what moves food through the digestive tract. The action starts in the oesophagus, where large balls of food are transported to the stomach by strong waves of smooth muscle. There, peristalsis takes place and the meal is subsequently digested into a liquid substance known as chyme. If you extend a section of intestine, it can be easier to see the wave-like motion.
The complete question is:
In which direction do the peristaltic contractions of the stomach's smooth muscle move contents?
a. From the body to the fundic region
b. From the pyloric region to the fundic region
c. From the antrum to the fundic region
d. From the body to the pyloric region
e. None of these answers are correct
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Explain how the sand castle in the video models the way weathering, erosion, and
deposition change rocks and the surface of Earth.
Answer:
In the video, the sandcastle represents the surface of the Earth, which is made up of different types of rocks. The sandcastle is exposed to different environmental factors, such as wind and water, which represent weathering and erosion, respectively. As the waves crash onto the sandcastle, the water breaks down the sand particles and carries them away, which is similar to how erosion works in nature.
As the waves recede, they deposit the sand particles on a new location, creating a new surface. This is an example of deposition, which can be observed in nature when sediment is deposited by water, wind, or glaciers.
The sandcastle also demonstrates how the forces of weathering, erosion, and deposition can change the shape of the Earth's surface over time. This process is known as geomorphology, and it involves the gradual transformation of the Earth's surface through natural processes.
Overall, the sandcastle in the video provides a simplified model of the complex processes of weathering, erosion, and deposition that shape the Earth's surface over time.
cell
organ
organ system
tissue
→
→
→
In order for the parts in a system to work correctly, the parts must be arranged or built upon in a particular order. What is the correct order of the parts of a human body system from simplest to most complex?
Answer:
THE ANSWER IS
cell, tissue, organ, organ system
Explanation:
From simplest to most complex it would be atom, molecule, cell, tissue, organ, organ system. Hope this helps!
Dalmatians and pugs are both the same species. However they look very different. For example, dalmations have spots but pugs do not. What type of variation is causing this difference?
Genetic differences can result through gene variants, often known as mutations, or a natural process in which genetic information is reorganized when a cell gets ready to reproduce (known as genetic recombination).
Genetic variation may be detected in a variety of methods. To ascertain genetic variation, observations of phenotypic variation in either discrete (traits that fall into discrete categories and are coded for by one or a few genes, such as white, pink, or red petal color in specific flowers) or quantitative (traits that vary continuously and are coded for by one or a few genes, such as leg length in dogs) traits can be used.
A method for assessing variation at the enzyme level called protein electrophoresis can also be used to find genetic variation.
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Please hurry this is 7th grade science
Biome Table - Abiotic and Biotic Factors of the Biomes
Use the digital resources provided on the last page to create a profile of each blome's characteristics
Biome
Precipitation
Temperature
(Average high,
Average low)
Animals (3-5
Examples)
Plants (3-5
Examples)
Facts (Location,
other names,
records)
Tundra
TO
Taiga
Tropical
Rainforest
Temperature, precipitation volume, and animal species are some of the characteristics of biome that includes abiotic and biotic factors.
A biome tale represents the biotic and abiotic factors in a biome or an ecosystem. Simply said, a biome is a huge ecosystem that is typically characterized by a number of biotic and abiotic elements, including temperature, precipitation, pH, light intensity, and others. Biomes can be categorized in a variety of ways. One of them is based on the weather, such as how hot, dry, chilly, wet, or humid it is.
Both living and non-living components affect how the ecosystem is organized. The main division of ecosystem components is into two categories.
Abiotic components or factors
Biotic components or factors
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The mysticetes rapidly speciated (radiated) ___________ mya, around the same time that the earth experienced rapid global cooling, which accompanied the opening of the Southern Ocean and polar waters became productive.
The mysticetes rapidly speciated (radiated) 34-23 mya, around the same time that the earth experienced rapid global cooling, which accompanied the opening of the Southern Ocean and polar waters became productive.
Baleen whales, commonly referred to as whalebone whales, are a suborder of carnivorous marine mammals in the suborder Cetacea that sieve planktonic organisms from the water using keratinaceous baleen plates in their mouths. The families Balaenidae, Balaenopteridae, and Cetotheriidae make up the order Mysticeti.
This time period, known as the Oligocene epoch, saw the emergence and diversification of the mysticetes, or baleen whales.
The global cooling and opening of the Southern Ocean created new ecological niches and food sources for these whales, allowing for their rapid speciation. This is an example of adaptive radiation, where a single ancestral species rapidly diversifies into multiple new species in response to new environmental conditions.
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According to the author of Passage 1, one of the reasons why dodo birds were so large is that they
"had no predators of nature." Passage 1 claims that the dodo bird had no natural predators when it was isolated on the island of Mauritius.
"had no natural predators." According to passage 1, when the dodo bird was isolated on the island of Mauritius, it had no natural predators. Passage 1 claims that the dodo bird had no natural predators when it was isolated on the island of Mauritius. The absence of predators made flight or other defensive adaptations unnecessary, allowing the dodo to develop. The size of the dodo was probably a survival strategy for reaching food sources that other birds couldn't. Unfortunately, when people came on the island, they brought with them predatory species, which ultimately caused the dodo to go extinct.
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According to the author of passage 1, the dodo bird's large size was likely due to its food sources, which included large, terrestrial animals.
The dodo bird was a flightless bird that lived on the island of Mauritius, which had a unique ecosystem with few predators and an abundance of food. The author suggests that the dodo bird evolved to be larger than other bird species on the island, as it did not need to fly and had access to plentiful food sources. The author does not suggest that competition with larger birds, interbreeding with other species, or the absence of predators contributed to the dodo bird's large size. Instead, the author highlights the unique ecological factors on the island of Mauritius as the primary driver of the dodo bird's physical characteristics.
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Correct question:
According to the author of passage 1, one of the reasons why dodo birds were so large is that they choose 1 answer: (choice
a.a competed with larger birds, such as the haastâs eagle. (choice
b.b had food sources that included large, terrestrial animals. (choice
c.c interbred with the larger, flightless moa. (choice
d.d had no natural predators on the island of mauritius.
ITS TIMED PLEASE HELPP
1. A blood clot forms in an artery and fills the entire lumen in that area where the clot forms. What effect will this have on blood flow?
A. Blood flow will increase to the tissue supplied by the affected vessel
B. It will reverse the direction of flow in that vessel
C. The blood flow will not be affected, and the same amount of oxygen will reach the tissues in the are of the clot
D. The flow of blood will be blocked therefore no oxygen will reach the tissues supplied by the affected vessel
2. Which of the following can cause the viscosity of blood to increase?
A. There is a high concentration of blood cells and platelets relative to the volume of water in blood
B. There is a low concentration of blood cells and platelets relative to the water in blood.
C. A person puts a lot of honey in their tea, causing the blood to become sticky.
D. A person drinks a lot of water, and the volume of blood increases in vessels
3. Which of the following will cause an increase in blood pressure?
A. slow heart rate
B. inactivity
C. increased blood volume
D. not using any salt in food
4. Which statement best describes veins?
A. Blood vessels that contain oxygen-rich blood
B. Blood vessels with a small diameter that are in direct contact with cells
C. Blood vessels that transport blood to or towards the heart
D. Blood vessels that transport blood from the heart to other parts of the body
5. Select the statement which best describes one of the factors that can affect blood flow and its effect.
A. The narrowing of blood vessels decreases the resistance and leads to a faster blood flow
B. A high viscosity of blood causes an increased resistance in the blood vessels and leads to a slow blood flow
C. Eating a diet high in animal fat tends to increase blood flow.
D. LDL cholesterol helps the body get rid of HDL cholesterol which reduces plaque deposits
6. Which of the following best describes the connection between cardiovascular disease and age?
A. As people age, their blood vessels become more elastic, leading to less cardiovascular disease
B. As people age, plaque builds up in the arteries increasing vessel resistance, which leads to cardiovascular disease
C. As people age, the heart becomes more efficient increasing cardiac output
D. As people age, blood pressure decreases leading to less cardiovascular disease
1. D. The flow of blood will be blocked therefore no oxygen will reach the tissues supplied by the affected vessel. 2.B There is a low concentration of blood cells and platelets relative to the water in blood.
3.D.not using any salt in food.
4.C. Blood vessels that transport blood to or towards the heart.
5.B. A high viscosity of blood cause an increased resistance in the blood vessels and leads to a slow blood flow.
6.B. As people age, plaque builds up in the arteries increasing vessel resistance, which leads to disease.
1.Organs and tissues may not receive enough blood, if any at all, when blood clots form in arteries. This sort of thrombus, which often develops inside the heart or in the coronary (heart) arteries, may lead to a heart attack.
2.Blood viscosity can be increased by either any pathological elevation of the components of blood or by a distortion in the form of red blood cells (RBCs), which causes RBC aggregation and restricted blood flow. Examples include serum proteins, RBC, WBC, platelets, and WBC.
3.Consuming a lot of sodium can raise blood pressure, and having high blood pressure raises your risk of heart disease and stroke. Sodium in our diets is primarily obtained through salt.
4.Vessels called veins are used to carry blood to the heart.
The veins in your body are responsible for collecting blood with low oxygen levels and returning it to your heart. Your heart, other blood vessels, and other organs work along with them to maintain blood flow. Veins are mostly where your body stores blood.
5.Factors that affect blood flow and blood pressure in the systemic circulation include cardiac output, compliance, blood volume, blood viscosity, and the length and diameter of the blood vessels.
6.As we get older, the complex regulatory interactions between our cells, organs, and systems change. These regulatory interactions are essential to the health of our cardiovascular system. In both cardiomyocytes and vascular smooth muscle cells, cellular ageing has been associated with a progressive decrease of physiological function.
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