Answer:
The reproductive system.
Explanation:
Without the reproductive system, humans are not able to reproduce meaning the human species would go extinct. With the reproductive system, humans are able to create more humans, in this way humans do not go extinct.
What are the 3 main NATURAL processes of the carbon cycle?
Answer:
The Carbon Cycle
Carbon moves from the atmosphere to plants.
Carbon moves from plants to animals.
Carbon moves from plants and animals to soils.
Carbon moves from living things to the atmosphere.
Carbon moves from fossil fuels to the atmosphere when fuels are burned.
Carbon moves from the atmosphere to the oceans.
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What is the general term for viruses and bacteria that make us sick?.
Which two animals use echolocation? bats and humans bats and dolphins dolphins and humans dolphins and butterflies.
The two animals which use echolocation are bats and dolphins.
Both hunt their prey by articulating high-pitched sounds and listening for the echoes.
What is echolocation?
Echolocation is a method used by bats, dolphins and other animals to select the location of objects using reflected sound. This allows the animals to move around in pitch darkness, so they can guide, hunt, identify friends and enemies, and avoid obstacles.
Thus, bats and dolphins are two animals that use echolocation.
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Answer:
Bats and Dolphins is the correct answer
Explanation:
The __________ collect(s) urine, which drains continuously from the papillae, and empty it into the __________
The calyces collect urine, which drains continuously from the papillae, and empty it into the renal pelvis.
What are the calyces?The calyces are specialized chambers located in the kidneys which are required to pass the liquid (i.e., the urine).
The calyces are fundamental for the normal functioning of the urinary system and normal body functioning.
The renal pelvis refers to the renal portion of the structure known as the pelvis (it is a bone structure).
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A condition or event in the environment is called a
stimulus
O homeostasis
O reproduction
O species
Answer:
A
Explanation:
homeostasis
What are the outcomes for hares being introduced into the grassland ecosystem
Answer: The correct answers should be the hares will multiply indiscriminately and destroy the ecosystem and the native herbivores will experience increased competition for resources.
Since the hares wouldn't have predators, and they are famous for rapid breeding, they would overpopulate the ecosystem. On the other hand, the native animals would have to compete with this population of hares for food and would have less for for themselves.
Explanation:
Was the ancestor terrestrial, aquatic, or live on both land and in water?
Answer:
Starting about 375 million years ago, transitional “fishapods,” with both primitive, fish-like traits and adaptations for semi-aquatic living, begin to appear in the fossil record.
consequences of recent human migrations on human health
Explanation:
The most frequent health problems of newly arrived refugees and migrants include accidental injuries, hypothermia, burns, gastrointestinal illnesses, cardiovascular events, pregnancy- and delivery-related complications, diabetes and hypertension.
Which of these best explains why transfer RNA is often considered a "bridge" molecule?
A.
It "connects" the strands of RNA to form a double helix.
B.
It "connects" all of the ribosomal RNA bases together.
C.
It "connects" ribosomes with the correct amino acid.
D.
It "connects" RNA to DNA
Answer: I think it's D.
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The picture shows us how the Sun's rays strike Earth. Because of the Earth's tilt on its axis, some parts of Earth are having summer
and others, winter. What letter or letters on the Earth are experiencing summer?
A) B
B) C
C) B and C
D) C and D
Answer:
B n C
Explanation: You can tell this because when you look at the diagram it shows B and C facing the sun so that means it's summer.
Answer
D.) C and D
Explanation:
It may look like B and C, but the sun hardly reaches up in the north, plus its axis is shifted so it's not technically summer for them yet, this leaves the bottom, which will rotate and give both sides the taste of summer glory.
Once the earth rotates more, it will be summer for B. and A.
But the graph shows that the answer is
D.) C and D
The term used for all floating and drifting organisms in the sea is:
Answer:
The answer is Plankton
Explanation:
A collection of tiny organisms living beneath the surface of lakes, rivers, ponds, and oceans across the planet are called plankton.The term Plankton is used for floating and drifting organisms in the sea.
What are plankton?Planktons are organisms found in water that cannot float against the water current.
The word plankton is derived from Greek which means to drift and float.
Thus, the term used for all floating and drifting organisms in the sea is plankton.
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2) The motion of the Earth is modeled here as it moves on its axis and around the Sun Which of these statements correctly identifies how the illustration supports the concepts of seasons on Earth? Select
ALL that apply
A) The tilt of the Earth is responsible for the seasons
B) The rotation of the Earth is responsible for the seasons
C) The proximity of the Earth to the Sun is responsible for the seasons
D) The revolution of the Earth around the sun is responsible for the seasons
E) The intensity of the sunlight on Earth is different as the Earth revolves around the sun
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Obliquity or tilt is the inclination angle of the Earth's axis. It is responsible for seasonal changes. The correct option is A) The tilt of the Earth is responsible for the seasons.
What is the Earth's obliquity -tilt-?The term obliquity or tilt refers to the inclination of the axis of the Earth. The plane in which the Earth orbits around the sun is not orthogonal to the Earth’s axis of rotation. The axis has an inclination angle called ecliptic obliquity.
Obliquity is a determinant of seasons' existence. Thanks to this inclination in the axis of the Earth there are seasons. If tilt would equal cero, there would not be any season or temperature change in different regions of the Earth. So tilt becomes a significant factor, especially for high latitude areas.
Obliquity is one of the three Milankovitch cycles, together with precession and eccentricity. These are used to explain natural climatic changes through the history of the Earth.
The correct option is A). The tilt of the Earth is responsible for the seasons.
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Answer:
the answer is A
Explanation: Reason being because only the tilt is responsible for the seasons.
what is the name of the cells that control the opening and closing of the stomota
Answer:
guard cells
Explanation:
they control the opening and closing of the stomata
What are the different systems of classification of organisms
Answer:
kingdom, phylum, class, order, family, genus, and species.
Explanation:
kingdom, phylum, class, order, family, genus, and species.
Classification is a grouping of individuals according to their similarities and differences. It is used to group organisms according to ranks of similar characteristics and evolutionary basis.
What are the levels of classification?Classification system is divided into various levels in order to rank the organisms.
It has following levels:
Kingdom: It is the highest level of classification. There are a total of five kingdoms.Phylum: It is classified on the basis of phenetics and phylogenetics.Class: each phylum can contain multiple class.Family: it is group of genera having similar traits.Genus: it helps to determine species of the organisms.Species: it is the lowest rank in this category. It is group of organisms having similar characteristics.Thus, kingdom, phylum, class, family, genus, species are the classification system of organisms.
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Keeping blood in the different chambers of the heart from mixing is a function what structure?.
Answer:
Muscular walls, called septa or septum, divide the heart into two sides and keep the two kinds of blood from mixing. Heart valves There are four valves within the heart. Each valve has flaps that prevent blood from flowing in the wrong direction — opening to allow forward flow of blood and closing to prevent backward flow.
Explanation:
How does the destruction of forests contribute to levels of atmospheric carbon?.
Answer:
This happens when the trees are cut down and burned, as the stored carbon was released into the air it converted into Carbon Dioxide.
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Describe where hormones are produced and how they are transported from endocrine glands to their target organs, including the pituitary gland, thyroid gland, pancreas, adrenal glands, ovaries and testes.
Answer:
Hormones are transported through the bloodstream or through fluid around cells.
Explanation:
Once they find a target, they bind with proteins in the cells located in the glands you specified, causing the cells to change activities.
Hormones are the chemicals that are produced by endocrine glands.
What are the endocrine glands?These are the glands that do not have ducts.These glands produce hormones.What are hormones?They are known as chemical messengers of the body.They can be either peptide or a steroid etc.They are directly poured into the blood.What are some examples of endocrine glands?Some endocrine glands are as follows:
pituitary gland, thyroid gland, pancreas, adrenal glands, etc.To learn more about hormones, endocrine glands and blood here,
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Which of the following (i-iii) will a person suffer from if he/she is travelling in a train which is overcrowded?
i.Heart attack
ii.Tuberculosis
iii.Typhoid
b. Justify your answer and also mention any two symptoms of the same.
Answer:
ii
Explanation:
tuberculosis is an airborne disease if one is affected he or she can spread the disease especially in closed crowded areas.
symptoms are continuous coughing over a week,loss of weight
Which chromosomes shown below are homologous?
A) B and C
B) D and B
C) C and A
D) A and B
The chromosomes shown below are homologous: C and A, which are in option C as Homologous chromosomes are a pair of chromosomes that carry genes for the same traits, such as eye color or height.
What are homologous chromosomes?Homologous chromosomes are important for the process of meiosis, which is the type of cell division that produces gametes (sex cells) in eukaryotes. During meiosis, homologous chromosomes pair up and exchange genetic material in a process called crossing over. This allows for the mixing and shuffling of genetic information, which increases genetic diversity and contributes to the evolution of populations.
Hence, the chromosomes shown below are homologous in C and A, which are in option C. Homologous chromosomes are a pair of chromosomes that carry genes for the same traits, such as eye color or height.
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can someone please help me with these?
Answer:
C.) 2
Explanation:
Just a side note, I just assigned a random letter to work through this problem. It does not matter what you choose.
The carrier genotypes are Aa while any non carriers are AA, and any affected would be aa.
You would go through each of the pairs and do a pedegree to find out the genotypes of the offspring they produce. For 1 it would be a pedegree for Aa from the mom and AA from the dad. There offspring would be 1/2 Aa and 1/2 AA.
For number 2 it would be Aa for the mom and Aa for the dad. There offspring would be 1/4 AA, 1/2 Aa, and 1/4 aa.
For number 3 the mom would have AA and the dad would be aa. There offspring would be 4/4 Aa
For number 4 the mom would be Aa and the dad would be AA. There offspring would be 1/2 AA and 1/2 Aa.
Group #2 are the only set of parents that would produce a offspring that would be affected by the genetic condition, so the answer is C
One autumn in the late 1990s, a number of people became ill after working at a single building at an industrial plant in a neighborhood of Baltimore, Maryland. Their symptoms ranged from simple coughing and other respiratory symptoms to pneumonia. At least one of the 70 people reporting symptoms died. He was 78 years old. The company voluntarily closed the building upon the recommendation of the Maryland Department of Health and Mental Hygiene. After all of the water systems at the plant were evaluated and disinfected, it re-opened and no new cases were reported.
1. Health departments often have less information than this when they start hypothesizing about the causative organism and its source. What is your first guess?
2. Describe the transmission characteristics of the suspected bacteria.
3. Is there a risk for a continuing community outbreak from these initial infections? Why or why not?
This disease is likely caused by a bacterium that was transported through the water. If water was infected only locally, likely, there are no outbreaks.
What can be guessed about the causative organism?The causative organism seems to be a type of bacteria in water. This is because disinfecting the water systems seemed to be the problem, which shows the source was there.
How are these bacteria transmitted?The suspected bacteria is transmitted through water. This seems to be the main transmission route because it seems workers experienced symptoms after drinking water.
Is there a risk for more outbreaks?If only the water of the plant was contaminated with this bacteria, it is likely there are no outbreaks. However, if contamination was general, outbreaks might appear.
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how is dna copied in your own words?
Answer:
Replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. DNA replication is one of the most basic processes that occurs within a cell. Each time a cell divides, the two resulting daughter cells must contain exactly the same genetic information, or DNA, as the parent cell. To accomplish this, each strand of existing DNA acts as a template for replication.
Replication occurs in three major steps: the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment. During separation, the two strands of the DNA double helix uncoil at a specific location called the origin. Several enzymes and proteins then work together to prepare, or prime, the strands for duplication. Finally, a special enzyme called DNA polymerase organizes the assembly of the new DNA strands. The following description of this three-stage process applies generally to all cells, but specific variations within the process may occur depending on organism and cell type.
Answer:
website answer... the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment.
Explanation:
in my own words... the double helix and the separation of dna strands and the priming temlete strand and the assembly of a brand new dna segment
HELP!!! will give brainliest!! need answer quickly!! An Ff mouse is bred repeatedly to an ff mouse, producing 500 total offspring. In theory, 250 offspring should be black and 250 should be white, but the actual numbers are 237 black and 263 white. Why does this happen?
When should dna be replicated? what life events would include dna replication?.
Answer:
During growth and development i.e, as you get bigger because the cells are multiplying in number.
During repair of worn out cells and tissues e.g if you get a cut.
(It also happens in your hair and skin, but, I wouldn't label these as "life events"
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The failure of the brain to work properly would most directly affect the what?
Answer:
The nervous system
It involves the brain
Will earth run out of water?
While our globe may never run out of water as a whole, it's crucial to realize that pure freshwater isn't always available where and when humans require it. In fact, only six countries contain half of the world's freshwater. Over a billion people do not have access to adequate safe, clean water. Water scarcity will afflict the entire planet by 2040 unless water use is significantly decreased. "If we keep doing what we're doing now, there will be no water by 2040."
According to the Frank-Starling Law of the heart, as contraction strength increases the stroke volume ________. Group of answer choices decreases shows no change increases
We can confirm that this law tells us that both stroke volume and contraction strength increase at the same time.
What is the Frank-Starling Law of the heart?This law indicates the relationship between the volume of the ventricle, specifically the left ventricle, and the strength of its contractions. It follows the logical approach that if there is more volume in the ventricle, the cardiac muscles will have to stretch to allow for the space, which in turn causes a much stronger contraction when these muscles activate.
Therefore, we can confirm that this law tells us that both stroke volume and contraction strength increase at the same time.
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Select the BEST reason that humans engage in selective breeding/artificial selection:
Not Specific Enough, but the best reason in my opinion would be:
Answer:
Selective breeding of plants and animals, including crop plants with better yields. ornamental plants with particular flower shapes and colors. farm animals that produce more, better quality meat or wool.
How are antibiotics different from "classic drugs"?
Answer:
Answer at explanation part.
Explanation:
An antibiotic is a type of antimicrobial substance active against bacteria.
Classic drugs can be harmful or addicting. So antibiotics are more useful than other drugs.
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help please!!!! it’s called DNA and genetics !!!!!
Answer:
9 is mutations
Explanation: