Protozoans like paramecium have protoplasmic invasions called gullets, which aid in these species' food uptake and digesting.
What are protists?Protists have eukaryotic cells, as opposed to bacteria, these organisms feature cytoplasmic membrane-bound components as well as a nucleus that is membrane-bound.
Another kind of protists is zooflagellates, they resemble animals and use flagella to move. Flagella are whip-like organelles that rapidly spin and help an organism move through the water like a boat's propeller.
The majority of zooflagellates have one to eight flagella that aid in movement, protists do not belong to a monophyletic group of creatures.
Therefore, The paramecium's gullet functions as the buccal cavity where food is transformed into food vacuoles for digestion.
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What is true about the relationship between cells and the organism they are part of?
Group of answer choices
Cells make up the basic structure of an organism, and they perform basic life functions for the organism.
Cells perform basic life functions for the organism, but they do not make up the basic structure of an organism.
Cells make up the basic structure of an organism, but they do not perform basic life functions for the organism.
Cells do not make up the basic structure of an organism, and they do not perform basic life functions for the organism.
The true statement regarding the relationship between cells and organism is that cells make up the basic structure of an organism, and they perform basic life functions for the organism (option A).
What is a cell?A cell is the basic unit of a living organism, consisting of a quantity of protoplasm surrounded by a cell membrane, which is able to synthesize proteins and replicate itself.
A cell is the basic unit of every living organisms meaning that a performs the basic function of living organisms. For example, the photosynthetic ability of a cell is a function of the chloroplast in the cell.
According to the cell theory proposed in the 1890's, which is the scientific theory that all living organisms are made of cells as the smallest functional unit, the cell is the basic functional and structural unit of living things.
Therefore, it can be said that a cell is the basic functional unit of the cell.
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6. Cilia and flagella are used to move substances along the surface of the cell instationary cells. Which of the following is another function of cilia and flagella?A. They hold neighboring cells in a fixed position.B. They move cells through watery environments.C. They transmit waste materials away from the cell.
Cilia and flagella are structures present in the cells that can be used for movement in aqueous media, such as in the case of spermatozoa (flagellum) and Paramecium (cilia).
This means B, they move cells through watery environments, is the right answer.
Why does the body need iron ? a. Stimulates formation of of lymph b. Forms part of hemoglobin c. Prevents destruction of red blood cells d. prevent the plaque formation in arteries
The body need iron because it is a major component of hemoglobin, an important cell for the organisms that carries oxygen from the lungs to all the parts of the body, without iron the number of hemoglobin is not enough to transport oxygen and the organism can be lead to fatigue. Therefore, the correct alternative is B. forms part of hemoglobin.
Enzymes_______activation energy and______up chemical reactions.
A. lower, speed
B. speed, lower
C. lower, slow
Answer:
A: lower, speed
Explanation:
Enzymes definitely speed up chemical reactions because they are proteins that act as biological catalysts. Catalysts speed up reactions without being used up themselves. They are reusable.
Lowering the activation energy makes the reaction faster because less energy is required to do the same task.
B and C do not make sense because speed activation energy doesn't make sense and slow up doesn't make sense either.
9. During which phase does the DNA make
a copy of itself?
a. prophase
b. metaphase
c. interphase
d. anaphase
Answer: A
Explanation:
!!!!
In a group of teocards, some individuals have a spotted coat and others have a black coat. Inthis group, the gene for the coat pattern trait has two alleles. The allele A is for a spottedcost, and the allele a is for a black coat.Farah is a leopard from this group. Farah's phenotype for the coat pattern trait is a spottedcat. Fera's genotype for the coat pattern gene is AA.Based on this information, complete the following statementfor the coat patter gene,homozygousheterozygous
The trait of interest is "coat pattern"
There are two observable phenotypes for this trait:
- Spotted coat
-Black coat
This trait is coded by two alleles:
A → code for a spotted coat
a → code for a black coat
Farah is a leopard with the phenotype "spotted coat" and its genotype is AA.
The genotype of this individual has two identical alleles. Genotypes with two identical alleles are called homozygous.
Why isn’t the mitochondria classified as part of the endomenbrame system
The endomembrane system encompasses the organelles that mediate the importa, export of molecules, that is, the transport of molecules from the environment to the cytoplasm and from the cytoplasm to the environment, respectively. The organelles that participate in such activities are the endoplasmic reticulum, the golgi apparatus, vacuoles and the cell membrane. Mithocondria's main purpose is energy production through oxidation of the carbohydrates/lipids we consume, thus, it is not related to molecule transport, and it can not be part of the endomembrane system.
watts.
6. Solve a One-Step
Equation A hair dryer is
rated at 1,200 watts. If you
use the dryer for 0.25 hours,
how much electric energy do
you use?
The electrical energy consumed is 0.3 kWh. Electrical energy is energy related to forces on electrically charged particles and electrically charged particle movement.
What is electrical energy?Electrical energy is the ability of an atom's charged particles to perform an action or move an object. Electrical energy is produced by the movement of electrons from one atom to another. When you plug in a toaster or a cellphone charger into a wall outlet, electrical energy is used to power those devices. Electricity can be either kinetic or potential.Batteries, lightning, and electrical charges moving through a wire plugged into a wall socket to power electrical appliances such as televisions and computers are all examples of electrical energy. It now even powers many of our automobiles. It can be found in the clouds above you during a storm even if you travel to the most remote parts of the planet.Therefore,
The amount of electrical energy consumed can be calculated as follows:
E = Pt
where;
P is the power (kW)
t is time (h)
E = 1.2 kW x 0.25 h
E = 0.3 kWh
As a result, the total amount of electrical energy consumed is 0.3 kWh.
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3. How might the changes that you identified affect the protein’s structure?Example: The change would likely have no effect. Neither valine and isoleucine would promote hydrogen bonding with water, because their R groups are nonpolar and thus hydrophobic.Changes spotted in the previous question:1. Valine changed for Isoleucine: there was not a change in the chemical properties, because both amino acids have non-polar chains2. Valine changed for Alanine: there was not a change in the chemical properties, because both amino acids have non-polar chains3. Glutamate changed for Alanine: there was a change because the aminoacidic chain lost their electronegativity4. Glutamate changed for Aspartate: there was not a change because the aminoacidic chain kept it's electronegativity.1) _______________________________________________________________2) _______________________________________________________________3) _______________________________________________________________4) _______________________________________________________________
In the previous exercise we spotted that in the sequences there were at least four changes in the aminoacidic sequences:
1. Valine changed for Isoleucine: as indicated by the very exercise, there wouldn't be a negative effect, because both amino acids have hydrophobic radical groups.
2. Valine changed for Alanine: like in the previous case, there wouldn't be a negative effect, because both amino acids have hydrophobic radical groups.
3. Glutamate changed for Alanine: there would be a change in the protein structure because Glutamate can form hydrogen bonds, and Alanine doesn't.
4. Glutamate changed for Aspartate: there wouldn't be a change in the protein structure because both amino acids can form hydrogen bonds.
What are three types of freshwater wetlands?
Freshwater wetlands are ecosystem affected by inundation (permanently or temporary). The three major types are swamps (uncultivated low-lying ground where water collects), marshes (low-lying and waterlogged land, flooded in wet seasons or at high tide) and bogs (wet muddy ground that's too soft to support a heavy body).
Which of the following molecules provides the greatest energy storage capacity in animal cells?
A. starch
B. proteins
C. triglycerides
Triglycerides are the molecules that provide the greatest energy storage capacity in animal cells.
What is triglycerides?Triglycerides are the type of fat also called lipids that are found in your blood. When you eat, your body converts calories that it does not need to use into triglyceride molecules. The triglycerides are stored in the fat cells. After the hormones release triglycerides for energy between eating. Sugary food, sweat drinks, saturated fats, refined grains, alcohol, and foods having high-calorie all lead to high levels of triglycerides. The healthcare provider classifies high triglyceride levels i.e. Mild levels as 150-199 mg/dL, Moderate level has 200-499 mg/dL, and Severe levels has Greater than 500 mg/dL. Very high triglycerides may cause blocking of the blood supply to the heart or brain. Symptoms of lower blood supply to your heart could be chest pain.
So we can conclude that option C is the correct answer.
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A scientist claims that Elysia chlorotica, a species of sea slug, is capable of photosynthesis. Which of the following observations provides the best evidence to support the claim?1) Elysia chlorotica grows in the dark when food sources are available.2) Elysia chlorotica grows faster when exposed to light than when placed in the dark.3) Elysia chlorotica will die if not exposed to light.4) Elysia chlorotica grows when exposed to light in the absence of other food sources.
The observation which best supports the claim that Elysia chlorotica is capable of photosynthesis is number 4. The ability to photosynthesize doesn't mean it won't be able to eat other food sources when abailable, but that it will be able to survive and grow in abscense of food sources if it is exposed to light, as light is necessary to obtain the energy for the process of photosyntesis.
Using the drop-down menus, identify the structures common to all cells.
What is the correct term for microbial action that converts inorganic phosphorous back into organic phosphorous?The process ofrefers to the conversion of inorganic phosphorous to organic phosphorous.
Phosphorus is very important for life because it makes up important structures in animals, supporting and allowing life.
In the biogeochemical cycle, during the immobilization process, inorganic phosphorus is converted into organic phosphorus and can be absorbed by living cells in the soil.
Therefore, the name of the process that converts inorganic phosphorus into organic phosphorus is immobilization.
True or False: Blood sugar would be lower than normal if alpha cells constantly secreted insulin.
Answer:
The human body wants blood glucose (blood sugar) maintained in a very narrow range. Insulin and glucagon are the hormones which make this happen. Both insulin and glucagon are secreted from the pancreas, and thus are referred to as pancreatic endocrine hormones. The picture on the left shows the intimate relationship both insulin and glucagon have to each other. Note that the pancreas serves as the central player in this scheme. It is the production of insulin and glucagon by the pancreas which ultimately determines if a patient has diabetes, hypoglycemia, or some other sugar problem.
View the attached worksheet. On this worksheet, you will build realistic (think of the animals and plants that exist in ecosystems near you) food chains that become increasingly more complex. You will use the information on your food chains to build a food web at the very end.
Sun -> Oak- > decomposer
Sun -> eucalyptus -> koala - > decomposer
Sun -> carrot -> rabbit -> owl- > decomposer
Sun -> algae -> krill -> penguin -> seal - > decomposer
Sun -> grass -> grasshoper -> mouse -> snake- > hawk -> decomposer
Is there any cons to the environment of living rurally ?
Living in rural environments can be difficult due to the distance from the major centers and amenities of urbanization, since the way in which the human pecies has adapted to live in a community is direct linked to technologies that are sometimes nor available in a rural region. The lack of diversity of functions can also become a hindrance, since the rural region have agricultural activities or related to agriculture as the marjor, or in some cases the only, possibility of branch of work.
To the environmental the increase in people living in a rural region is the increased comsumption and exploitation of local natural resources, as well as the urban expansion for housing construction and other infrastructures. The population growth in the region can inevitably leads to climate changes and modifications in the fauna and flora.
which statement best describes an example of how climate change leads to decreased biodiversity?
A. Increased rains in dry regions cause more plants to grow,
increasing the ecosystem's resiliency.
B. High temperatures become more common farther from the
equator, leading to increased stability of the ecosystem.
C. Warmer arctic regions allow for increased animal populations,
changing the ecosystem's resiliency.
0
D. Sea levels rise due to increased temperatures, flooding coastal
areas and leading to an unstable ecosystem.
The statement which best describes an example of how climate change leads to decreased biodiversity is that sea levels rise due to increased temperatures, flooding coastal areas and leading to an unstable ecosystem and is denoted as option D.
What is Ecosystem?This is a term which consists if all organisms and their interaction with their physical environment and is affected or influenced by different types of factors such as human and environmental factors.
An example is climate change which causes sea levels to rise thereby flooding areas. It leads to loss of habitat and an unstable ecosystem which decreases the biodiversity.
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Finish the DNA strand using
complementary base pairing rules.
A-G-T-C-T-G-C
Answer:
T-C-A-G-A-C-G
Explanation:
You work with the Environmental Protection Agency and are attempting todetermine hazard levels for the insurance company. Which of the followingindividuals has the lowest risk of getting cancer?A. Someone taking hormone therapyB. A smokerC. Someone infected with HPVD. Someone getting heart bypass surgery
The individual with the lowest risk of getting cancer is someone getting a heart bypass surgery. Even though surgeries have riks, cancer is not one of them, and the rest of the conditions (HPV, hormone therapy and smoking) are fact
What’s the correct answer answer asap for brainlist
Is it C?
The way in which a neuron goes from a negative charge to positive charge is that: C. an action potential opens the gate sodium channels stay behind, and floods the cell with positive ions.
What is a neuron?In Science, a neuron can be defined as a nerve cell that is saddled with the responsibility of transmitting electrical signal (impulses) down an axon across a cellular membrane of the body of a living organism, especially through an action potential.
Generally speaking, the neuron comprises different parts and are of different types which include the following:
Cell bodyMyelinSensory neuronDendritesMotor neuronReceptor neuronAxonAction potentialWhat is an action potential?An action potential simply refers to a sudden, fast change in electrical (voltage) potential with respect to the transmission of an impulse to a receptor, across a cellular membrane such as the following:
A nerve cellA muscle cellIn conclusion, a neuron changes from a negative charge to positive charge because a resting potential neuron has a negative charge while sodium ions have a positive charge.
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The element chlorine belongs to which of the following groups?
*
2 points
alkali metals
halogens
noble gases
alkaline earth metals
Answer:
hallogens
Explanation:
b/c alkali and alkaline eearth metals both are group 1 and 2 hallogens group 7 and noble gases group 8 .
Cells need energy in order to perform most cellular processes. This energy is produced throughthe process of cellular respiration. Which of the following describes this process.A. water is transported into the cell to create ATP.B. sugar molecules are broken down to produce ATP.C. light is captured and used to build sugar molecules.D. carbon dioxide molecules are combined to create protein molecules.
The correct answer is B. sugar molecules are broken down to produce ATP. In cellular respiration sugars are broken down. During the process, they release energy that allows the cell to produce ATP.
Create a phylogenetic tree of the major groups of plants using green algae as the outgroup. You should include angiosperms, gymnosperms, ferns and their allies, and bryophytes making sure to provide characters on the tree indicating why lineages separated where they did.
In this case, we have the major groups of plants, many characters have defined the appearance of each group however there are some traits that are too important and those are mentioned here.
In the base is algae, when the retention of the Zygote occurs plants started to evolve when plants started to evolve in earth bryophyte came to be, however they do not possess a proper vascular system, this occurred with pteridophytes (ferns and so forth), nonetheless still produced spores, angiosperms reduced gametes and pollen came as innovation, however, they produced strobili, so the innovation of angiosperms were flowers.
Given: dna codon chart, DNA sequence.DNA sequence given is: 3’ TAC CCC GAT AAA ATA CAT TTA GGA TCG CGA TGG TAT 5’How do you transcribe the DNA sequence into mRNA?And can you underline or highlight on the sequence the codons for Proline and Tyrosineand label which is which? Thanks
Step 1:
The process of DNA transcription occurs from the 5' to 3' being the DNA sequence in the correct order for transcription as follow:
5' TAT GGT AGC GCT AGG ATT TAC ATA AAA TAG CCC CAT 3'
Step 2:
Resulting in the mRNA:
5' AUA CCA UCG CGA UCC UAA AUG UAU UUU AUC GGG GUA 3'
- Being the nucleotide thymine replaced by uracil in the formation of the RNA strand.
Step 3:
The codons sequence that form proline and tyrosine are:
Proline: CCA;
Tyrosine: UAU.
primates have long growth and development periods because:
Primates have long growth and development periods because: they have larger brains and higher intelligence as compared to other organisms.
Primates is the order of the class Mammalia. They are different and more advanced from all the other animals. They have more intelligence, five-digit feet and hand, more vision power than smelling power and slower growth. Their life span is also very large.
Brain is the most complex and largest organ of the body. It is the master regulator of all the actions of the body. The brain is divided into left and right hemispheres. There are three sections of the brain: forebrain, midbrain and hindbrain.
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What is the genetic make-up of an organism?A) PhenotypeB) AllelesC) GenotypeD) DNA
Solution:
The genotype is the collection of genes of an individual, that is, it is the genetic information that a particular organism possesses. This means that in a broad sense, the term genotype refers to the genetic makeup of an organism.
We can conclude that the correct answer is:
C) Genotype
There is a key difference between aerobic respiration (cellular respiration) and anaerobic respiration (fermentation). Explain this difference and what is the overall equation for aerobic cellular respiration.
The key difference is that aerobic respiration requires oxygen, and anaerobic respiration does not.
Aerobic respiration in a cell is when glucose breaks down with help of oxygen and yields carbon dioxide, water, and with the release of energy. Thus end products are [tex]CO_2}[/tex] and [tex]H_{2}O[/tex] .The process of releasing energy takes a much longer time. Example it occurs in plants and animals.
Anaerobic respiration in a cell, is the process of breaking down glucose without the use of oxygen then it yields to the end products [tex]CO_{2}[/tex] (carbon dioxide), alcohol and energy. It is a fast process. Example human muscle cells, and bacteria.
The equation for aerobic cellular respiration
[tex]C_{6} H_{12} O_{6} + 6O_{2}[/tex] ⇒ [tex]6CO_{2} + 6H_{2}O[/tex] + ATP(energy)
Glucose + oxygen ⇒ carbon dioxide + water +energy.
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You are examining a patient who has been in an accident. You test their motor skills and find that they can move their limbs but cannot write with a pencil and stumble often when walking. You conclude that they have damage to the part of the brain that governs fine muscle control. What area is this?A. Brain stemB. PituitaryC. Cerebral cortexD. Cerebellum
The answer is the letter D. Cerebellum- responsible for fine muscle control.
*Cerebellum is responsible for maintaining balance and posture.
Distinguish between monohybrid, dihybrid and test crosses.
In the monohybrid cross, the possible offspring of a cross between two organisms is evaluated, but only one characteristic is taken into account. While in the dihybrid cross two characteristics are evaluated.
However, unlike the monohybrid cross, in the dihybrid cross, combinations of alleles must be made in order to obtain all possible gametes and thus perform the punnet square properly. An example of a dihybrid cross and allele combination is shown in the following image:
Finally, a test cross refers to these two examples. A test cross taking into account only one trait is called a monohybrid cross. A test cross using 2 traits is a dihybrid cross.