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Snezhnost [94]
2 years ago
14

Help I need help help

Biology
1 answer:
Sloan [31]2 years ago
7 0

Answer:

12-B

13-A

14-B

16-C

17-C

18-B

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Explain how meiosis promotes variation in a species.
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In meiosis, the chromosome pairs do the crossing over where there is an exchange of genetic material between them and because of it the chromatids held together by the centromere are no longer the same.
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I think the cytoskeletal protein that helps a cell maintain its shape is actin.
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A solution is classified as a weak base. Which of these could be the pH of the solution?
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Answer:

C

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The hindbrain consists of the ____. a. thalamus and hypothalamus b. tectum, tegmentum, and reticular formation c. medulla, pons,
slavikrds [6]

The hindbrain consists of the medulla, the pons, and the cerebellum.

<h3>The hindbrain</h3>

The hindbrain is the portion of the brain that is otherwise known as the rhombencephalon. It is the part of the brain that is located towards the lower back.

The hindbrain consists of 3 main parts:

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  3. The cerebellum

Each component has specific functions they perform. The medulla oblongata is located at the extreme end where the brain connects with the spinal cord. It controls activities such as heartbeat, blood pressure, and respiration.

The pons of the hindbrain work hand in hand with the medullar oblongata for effective breathing. In addition, it is the part of the brain that controls the circadian rhythm of the body.

The cerebellum helps the body to maintain postural balance and adjustments when necessary.

More on the hindbrain can be found here: brainly.com/question/5427915

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3 0
2 years ago
Estimate the number of cells that belong to each phase of the cell cycle
svlad2 [7]

There are two ways to do this.  You could actually learn the phases and count each one.  Since you're posting here, it's a safe bet you have no intention of actually learning the material.  The second is to estimate based on the total number of cells.  At any given time, you will have approximately the following percentages for each phase of the cell cycle:

Interphase - 96%

Prophase - 2.5%

Metaphase - .5%

Anaphase - .5%

Telophase - .5%

In the picture, there are about 120 cells.  Now you have to do a little 5th grade math to calculate the approximate mumbers of each phase.  So, for Interphase, we multiply 120 x .96 = 115.  For Prophase we multiply 120 x .025 = 3.  For Metaphase, Anaphase, and Telophase, we multiply 120 x .005 = .6, which rounds up to 1 each.  Now, as I specified, these numbers are approximate.  Looking at the picture, I count three that are in Metaphase, two that are in Anaphase, and at least three in Telophase. And there are more than three in Prophase.  The best way to figure this out is to print the picture and, using a guide from the internet, count the cells in each phase, marking them off as you count them so that you don't recount them.  Good Luck!

5 0
3 years ago
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