Which is of the following is necessary for natural selection? 1. There must be a shortage of food 2. There must be a change in the environment, causing individuals to change 3. There must be some genetic differences among the individuals of a species 4. all of the above
Answer:
It's 3!
Explanation:
There must be genetic differences so the best fitted organisms will survive. If they were all the same then no one would be best fitted and Natural Selection wouldn't be able to occur
It's not 1 because a food shortage isn't required, there's always competition for food sources
It's not 2 because there doesn't need to be a change in the environment for natural selection, just for evolution.
And it can't be 4 if 1 and 2 are wrong!
Hope this helped!
What is the volume of a square pyramid with a base edge of 14 m and a slant height of 25 m
Answer:
length of base(l) = 14m
slant height (s)=25m
we know,
slant height(s)=√(l/2)^2 + h^2
or, 25= √(14/2)^2+ h^2
or, 25 = √49+h^2
or, 25^2 = 49+h^2
or, 625 = 49 + h^2
or, 625-49=h^2
or, √576 =h
h=24
Therefore vertical height (h)= 24m
Again,
Volume of square pyramid (v) = 1/3 L^2h
or, v =( 1/3) 14^2×24
or, v= 4704 / 3
Therefore, V= 1568 cubic meter.
If you dissected an owl pellet and found several of the skulls shown, what would you conclude is the preferred prey of this owl?
bat
gopher
mouse
shrew
Answer:
The answer is C. mouse
Explanation:
Answer:
it is c or mouse
Explanation:
If you cross an AAbb individual with an aabb individual, what will the genotype ratio be in the next generation? What will be the phenotype ratio?
Answer:
Genotype of offspring = Aabb
Genotype ratio will be 100 % as all the offspring will have the same genotype
Phenotypic ratio = 100% all the offspring will have the same phenotype
Explanation:
Genotype of First parent - AAbb
Genotype of Second Parent - aabb
Gamete of first parent - Ab, Ab, Ab, Ab
Gamete of second parent - ab, ab, ab, ab
All the offspring will have genotype Aabb
Phenotypic ratio = 100% all the offspring will have the same phenotype
(b) Identify the dependent variable in the experiments. Identify a control group missing from the second experiment. Justify the need for this control group in the second experiment.
Hello. You have not submitted the experiments to which this question refers, which makes it impossible for it to be answered. However, I will try to help you in the best possible way.
A dependent variable is one that is influenced by an element, in order to present a result, that is, it is a variable that does not establish itself, being dependent on another variable to establish itself. An example of a dependent variable can be seen in an experiment that seeks to determine the differences in growth rates of bean plants that were fertilized with different organic fertilizers. As you can see, this is an experiment where the different organic fertilizers influence differences in the growth rate of bean plants. Thus, the growth of these plants depends on the fertilizer, this growth being the variable dependent on the experiment.
A control group, in turn, is an element of the experiment that does not receive the element that is being tested in the same experiment. The control group is important, because it allows the researcher to see the results of a system where the tested element does not exist, thus being able to determine the real differences that the tested element is capable of causing. Using the same example presented in the paragraph above, we can see that the different organic fertilizers are the elements tested in the experiment. These fertilizers will be applied to the plants, however it is important that at least one of these plants does not receive any fertilizer, so that the difference between a system with fertilizer and a system without fertilizer can be evaluated. This plant that received no fertilizer is the control group.
What percentage of the moon as seen from Earth is illuminated during the third quarter phase?
Answer:
50% of the moon is illuminated during a third quarter phase
Answer:
50% I hope this answers question
_________ is a mitochondrial disorder.
Answer:
cell malfunction
hope this helps you ☺️☺️
why do large organisms require a transport system?
Answer:
Larger animals have a lower surface area to volume ratio. This means they need transport systems like our circulatory system and exchange surfaces like our lungs or fish gills. In single-celled organisms such as protists, and small multicellular organisms, essential molecules will move to where they're needed by diffusion.
Explanation:
Answer:
As the size of an organism increases, its surface area to volume ratio decreases. ... Large multicellular organisms therefore cannot rely on diffusion alone to supply their cells with substances such as food and oxygen and to remove waste products. Large multicellular organisms require specialised transport systems.
Explanation:
What do the circles represent
Answer:
nothingkekwowkwo
Explanation:
nothingsjejskskwko
describa la evolución de los seres humanos a partir de los primates iniciales. incluye en su análisis características como la visión binocular, las manos que sostenían los objetos, la locomoción bípeda, la vida social, la fabricación de herramientas y el aumento del tamaño del cerebro
bro like can someone actually help please
Oh, it's easy. Basically, this is all you need to know:
C matches with G, and A matches with T.
So wherever you see a C, write "G."
Wherever you see a G, write "C."
Wherever you see an A, write "T."
Wherever you see a T, write "A."
how most of our excretory system is not dedicated to excreting; it’s dedicated to reabsorbing.
Answer:
Not all animals use the same routes or excrete their wastes the same way humans do. Excretion applies to metabolic waste products that cross a plasma membrane.
The excretory system works with the respiratory, endocrine, urinary and digestive system. It works with the respiratory system because it helps the lungs get rid of carbon dioxide and water vapors. It works with the digestive system to help get rid of wastes that you eat through the anus.
Lilly and her lab partner, Alberto are investigating factors that influence the rate of photosynthesis. They know that any change to the reactants in photosynthesis could have an effect on the production of glucose and oxygen. In doing some research, the pair comes across the data shown above. They decide to brainstorm possible variables they could change in their experiment that could increase the rate of photosynthesis. Evaluate their list of possibilities. Based on the data and your knowledge of photosynthesis, what would you advise Lilly and Alberto to consider changing in their experiment if they wanted to increase the rate of photosynthesis? Choose ALL that apply.
Answer:
A and B
Explanation:
The correct answers would be A, B, and E. Hope this helped. Have a nice day :D
The diagram below shows two processes, P and Q, in the carbon cycle.
Which of these statements best describes the processes P and Q?
P shows diffusion and Q shows weathering.
P shows weathering and Q shows diffusion.
P represents combustion and Q represents decomposition.
P represents decomposition and Q represents combustion.
Answer:
P shows diffusion and Q shows weathering.
Explanation:
The process shown in the image attached to this question is a part of the carbon cycle. Based on the image in this question, atmospheric carbon enters the ocean in a process called P while carbon deposited in limestone is released into the atmosphere via a process called Q.
- Atmospheric carbon which is carbon dioxide (CO2) enters the surface of the ocean via a process called DIFFUSION, hence, process P shows diffusion
- Also, for the carbon in limestone to be released into the atmosphere, the limestone has to be broken down in a process called WEATHERING. Hence, process Q shows weathering.
1. All animals except sponges have , groups of cells that work together to perform a specific function. 2. All animals eat other organisms in order to gain building materials for the body. This makes them , since they obtain necessary energy and chemical building blocks from the environment. 3. One key adaptation of animals was the evolution of a(n) , a fluid-filled gap between the outer wall of the body and the outer wall of the digestive system. 4. All animals are , organisms with cells that are relatively large, complex, and contain membrane-enclosed organelles such as the nucleus. 5. Cnidarians are the only animal phylum to display , meaning that their bodies can be divided any way through the center point to yield two even halves.All other adult animals display , meaning that their bodies can only be sliced lengthwise through the midline to produce two even halves.
Answer:
1. Tissues
2. Heterotrophic
3. Body cavity
4. Eukaryotes
5. Radial symmetry; bilateral symmetry.
Explanation:
1. All animals except sponges have tissues, groups of cells that work together to perform a specific function.
Sponges are sea animals which are found attached to surfaces. They are multicellular and heterotrophic like other animals, but they lack true tissues and organs.
2. All animals eat other organisms in order to gain building materials for the body. This makes them heterotrophic, since they obtain necessary energy and chemical building blocks from the environment.
Heterotrophs are organisms that cannot manufacture their own food, but obtain it from their environment instead.
3. One key adaptation of animals was the evolution of a body cavity, a fluid-filled gap between the outer wall of the body and the outer wall of the digestive system.
A body cavity is a space found inside the body that is filled with fluid and which holds and protects internal organs. There are several cavities found in the human body and they are separated by membranes as well as many other structures.
4. All animals are eukaryotes, organisms with cells that are relatively large, complex, and contain membrane-enclosed organelles such as the nucleus.
5. Cnidarians are the only animal phylum to display radial symmetry, meaning that their bodies can be divided any way through the center point to yield two even halves.All other adult animals display bilateral symmetry, meaning that their bodies can only be sliced lengthwise through the midline to produce two even halves.
What are the spikes on my potatoes? I have had them on my counter for a min and it looks like they are turning into mutants
2. Which statement does not accurately describe natural selection?
A. Individual organisms change their genes to adapt to their environment.
B. The genetic composition of a population changes from one generation to the next.
C. More advantageous traits become more common in populations.
D. Beneficial and useful traits are inheritable.
Answer:
It is individual organisms change their genes to adapt to their environment.
correct answer is A
Why is it important for the aorta be to be as wide as it is?
Answer: It distributes oxygenated blood to the different tissues, it has to be wide enough to fit everything through as efficiently as it can.
essentially its like a tunnel and tunnels have to be wide to fit everything through
Answer:
Aorta is a major vessel that distributes oxygenated blood to the different tissues in the circulatory system. It is also the largest known blood vessel in humans
Explanation:
15
Select the correct answer.
Which of the blood reagent tests result in a blue-green color when it touches blood?
OA Phenolphthalein
O B. Luminol
OC. Fluoresceln
OD HemaStix
Reset Next
Answer:
The correct answer is - D. Hemastix
Explanation:
HemaStix is a blood reagent test to test the blood present in a sample with the help of strips of tetramethylbenzidine and hydrogen peroxide. It is a presumptive color test. A presumptive color test that detects blood.
In this test, the plastic pad of TMB and hydrogen peroxide gets a sample from a wet swab, initially, it gives yellow color but if there is blood and it touches with blood it will turn green or blue-green. It does not require to destroy the DNA of the blood cells.
Why do we exhale more carbon dioxide than we inhale?
Answer:
When we exhale, we breathe out less oxygen but more carbon dioxide than we inhale. The carbon we breathe out as carbon dioxide comes from the carbon in the food we eat. The carbon dioxide is dissolved in the blood, carried to the lungs by the circulation, and breathed out.
Answer:
because our bodies take in O and put out CO2
Explanation:
O is Oxygen
and CO2 is Carbon dioxide
Is the following sentence true or false? During meiosis, the two alleles for each gene stay together.
Answer:
False
Explanation:
During meiosis, a cell goes from a diploid stage to a haploid stage. So no, the alleles do not stay together.
The Meiosisi is basically a process by which the number of chromosomes is reduced by half to form a sex cell.
When there is no pattern to a
population's growth, it is known as
A. irregular
B. stable
C. irruptive
D. cyclical
When there is no pattern to a population's growth, it is known as stable. The correct option is B.
What is population growth?The rise in the number of people on Earth is referred to as population growth. The majority of human history saw a relatively steady population size. Energy, food, water, and medical care, however, became more accessible and dependable as a result of innovation and industrialisation.
The predicted population expansion is due in part to factors like an increase in young, unmarried mothers, high fertility rates for specific ethnic groups, and a lack of access to contraception and sexual education.
When age-specific fertility and mortality rates are constant over a long period of time, there is a stable population growth.
Contrarily, an irregular population increase is one in which there is no structure and the population size behaves chaotically.
Thus, the correct option is B.
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Give an example of how biotechnology might be used to cure disease.
Answer:
Biotechnologies may be used to study the genetic material of viruses and bacteria to determine whether a disease is caused by particular disease-producing agents. Its techniques are also used to understand how genetic factors contribute to human disease.
Explanation:
Answer:
These products help treat and prevent diseases. From the Ebola vaccine to mapping human DNA to agricultural impacts, medial biotechnology is making huge advancements and helping millions of people. Some of the most recent uses of biological tech is work in genetic testing, drug treatments, and artificial tissue growth.
Explanation:
⦁ Arrange these statements in the right order to describe process of inhalation.
____ Air is drawn into the lungs
____ Air pressure in the chest cavity decreases
____ Lungs expand
____ The diaphragm contracts and flattens
____ The muscles between the ribs contract to move the ribs up and out
Answer:
air is drawn into the lungs
lungs expand
the muscles between the ribs contract to move the ribs up and down
air pressure in the chest cavity decreases
the diaphragm contracts and flattens
Inhalation has been part of respiration. It includes drawing air into the lungs that expand the lung cavity by pulling the ribs leading to contracting the diaphragm followed by a decrease in lung pressure. Thus the correct order is 1, 3, 5, 4, and 2.
What is inhalation?Inhalation is the respiratory process to inhale oxygen inside the respiratory system for the cellular and respiratory processes. At first, the air is drawn into the lungs followed by expansion of the lungs.
This causes the ribs muscles to move up and down to accumulate the volume. This movement causes the diaphragm to flatten and contract which allows the oxygen to take place in the lungs that decreasing the air pressure in the cavity.
Therefore, the air is drawn inside the lungs in inhalation.
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A behavioral or physical adaptation is something ___
helps a species survive
makes a species prettier to look at
makes a species become extinct
prevents a species from surviving
Answer:
Explanation:
The answer is
helps a species survive
Answer:
helps a species survive
Explanation:
how is electricity generated in Minnesota recently?
Answer:
Almost all the rest of Minnesota's electricity generation comes from wind, which supplied 19% of the state's electricity net generation in 2019, and natural gas, which fueled 18%. Smaller amounts of electricity are generated from solar energy, biomass, and conventional hydropower.
Explanation: Hope this Helps:)
Can you please help me
Answer: the last one
Explanation: yuh
Answer:
i think the last one would be the right answer
dna replication
aaccagaccca
ttggtctgggt
Answer: dna replication happens in interphase before the mitosis
Explanation: During interphase the cell’s DNA inside the nucleus replicates forming two strands of DNA or chromosomes. In the interphase the DNA replicates in the S phase. Don’t confuse with G1 since in G1, which comes before S phase, replicates the cellular contents needed for this process
1. Explain the contributions of Nicholaus Steno to geology.
in pea plants, purple are dominant to white.
complete the chart showing the genotypes and phenotypes possible.
someone help me i’m kinda lost on how i do this
Answer:
PP (genotype) - Purple (Phenotype)
Pp (Genotype - Purple (Phenotype)
pp (Genotype) - White (Phenotype)
Explanation:
The genotype allele combinations, in order to for purple to be dominant there are three possible genotypes
*Capital P represents a purple dominant allele
*Lowercase p represents a white recessive allele
(Alleles are the variants of a certain gene, ex: brown eyes, green eyes, etc. )
A Dominant always overpowers the recessive, the only way for a recessive to show would be to have two recessive alleles from both parents
ex: Green eyes recessive to Brown
B - Brown bb = green eyes (from dad)
b - green bb = green eyes (from mom)
this means that their child would have green eyes because there is no brown present
So for your pea plants to be purple
Pp = Purple pp = white
PP = Purple (yes there can be white recessive present, it just might not appear as a plant because of the percent of purple)
The colors or observations we see as the plant are the phenotypes
so the colors I have listed would be the phenotypes
Don't get alleles and phenotypes confused, alleles are the various forms of a gene, and phenotypes are what we see when the gene is brought through.