BIOLOGY HIGH SCHOOL

An ecosystem includes what?

Answers

Answer 1
Answer: Living and non living things
Air
Prey/ Predator 

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two identical daughter cell result from mitosis and cytokinesis. In what ways are they " identical"?
Several events happen during sexual reproduction in flowering plants. Put these processes in the correct order, ending with the process seen here.
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Which statement concerning osmosis and active transport is NOT correct?A: Both endocytosis and active transport require cell energy. B: Osmosis requires cell energy while active transport does not. C: is crossed out D: Diffusion of gases and other small molecules requires no energy on part of the cell.

A population of deer is separated by an emerging volcano. The two populations come back into contact 200 years later, but are incapable of breeding. Which of the following best describes the process that occurred?A)adaptation
B)speciation
C)convergent selection
D)stabilizing selection

Answers

Answer:

B)speciation

Explanation:

Speciation is the term used to refer to the division of a lineage that produces two or more different species. In a nutshell, we can say that this is the process of the emergence of a new species, and the crucial event for this to happen is reproductive isolation. This reproductive isolation impedes the gene flow, therefore, obeying the biological concept of species, we say that a new species has emerged.

An example of speciation is shown in the question above, where a volcano separated two species and left them in reproductive isolation. The result of this was that two populations became so different from one another that they became unable to breed, creating new species.

B is the correct answer for e2020

The _____ nerve connects to the heart and adjusts its speed according to the body's demands.

Answers

The vagus nerve connects to the heart

When Gregor Mendel crossed true-breeding tall plants with true-breeding short plants, why was it impossible to observe segregation? A. Alleles for height do not segregate in the F2.

B. Alleles segregate only in the F2 generation.

C. Alleles segregate best when two tall plants are crossed.

D. Alleles in the F1 must be Tt to have height variety in the F2.

Answers

When Gregor Mendel crossed true-breeding tall plants with true-breeding short plants, it was impossible to observe segregation because D) alleles in the F1 must be Tt to have height variety in the F2.

Answer:

Alleles in the F1 must be Tt to have height variety in the F2.

Explanation:

  • The law of segregation given by Mendel states that the pair of an allele for a given gene separate during the formation of gametes and then these gametes fuse randomly with each other during fertilization to determine the genotype of the individual.
  • Therefore, for a pure breeding tall plant, the alleles would form two gametes each having the allele T and for a pure breeding small plant, each of the gametes will have allele t.
  • Therefore, the only possible combination from TT X tt would be Tt and thus, segregation is not observed.

What would happen to an animal cell with an internal salt concentration of 10% if it were placed in a salt solution with a concentration of 30%? O The water would move out of the cell and the cell would decrease in size.

O The water would move into the cell and the cell would increase in size.

O The salt would move into the cell and the cell would increase in size.

O The salt would move out of the cell and the cell would decrease in size..​

Answers

Answer:

The water would move out of the cell and the cell would decrease in size.

Explanation:

This question is depicting OSMOSIS, which is the movement of water from a region of high concentration (low solute concentration) to a region of low concentration (high solute concentration) across a semi-permeable membrane. This movement is caused when a concentration gradient forms between the two sides of the membrane.

In this case, an animal cell contains an internal salt concentration of 10% while the salt solution has a concentration of 30%. This means that the animal cell is hypotonic (contains high water concentration) to the salt solution, hence, water would move out of the cell and the cell would decrease in size

If an animal cell with an internal salt concentration of 10% is placed in a salt solution with a concentration of 30%, the water would move out of the cell and the cell would decrease in size.

If an animal cell with an internal salt concentration of 10% is placed in a salt solution with a concentration of 30%, the water would move out of the cell due to osmosis. The higher external salt concentration draws the water out of the cell, causing the cell to shrink or decrease in size.

Learn more about Osmosis here:

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Your body needs to make large molecules such as enzymes (proteins), body fat (lipids)and DNA (nucleic acids) to function properly. Where does your body get the elements to
make these large molecules?

Answers

Answer:

You can get them either from your DNA from your parents and you also get them through the food that you eat.

Explanation:

Q: Which dinosaurs were plant eaters

Answers

Any and all herbivore dinosaurs including triceratops
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