Explain the structure and function of villi in the small intestine

Biology

1 answer:

maw [93]4 years ago

5 0

The purpose of the villi is to increase the internal surface area of the intestinal walls making available a greater surface area for absorption, i will attach a picture of the villi for the structure part of this question

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Pollen and Ovules are gametes. How many chromosomes would they have compared to the rest of the plant's body cells? What process

Svetlanka [38]

Answer:

a. They would have half chromosomes as much as the plants body cells.

b. Meiosis

Explanation:

Gametes are sex cells produced only in sexually reproducing organisms. In plants as stated in this question, male gametes are contained in pollens while female gametes are contained in ovules. The process by which these gametes are made is called MEIOSIS.

Meiosis is a cell division that reduces the chromosomal number of the parent cell by half. This means that each GAMETE will contain half the number of chromosomes as the parent cell. Fir example, if the body cell of a plant contains 30 chromosomes, each gamete formed via Meiosis in that plant will have 15 chromosomes.

In a nutshell, pollen and ovules, which are gametes of plants formed by MEIOSIS would have half chromosomes as much as the plants body cells.

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What is the correct term the nurse should use to describe a client who has a positive tuberculin skin test but is asymptomatic?

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Which information would be appropriate for the nurse to include in the teaching plan ... Which term should the nurse use to describe the serous membrane covering .... describe a client who has a positive tuberculin skin test but is asymptomatic. And Indeterminate isn't a term used to describe results of a PD test. If the PD is ... positive. However, all but infants and suppressed people will remain asymptomatic. ... A client with a positive skin test for TB isn't showing signs of active disease. .... The nurse correctly interprets this reaction to mean that the client has:

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4 years ago

What moves across axons?

Anna71 [15]

The answer will be C) Electrons and Ions love

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Can someone help me with a biology related question? I'm offering good points!!!!! Help me out please.

miss Akunina [59]

First, write out all combinations for the parents:
SsBB:
SB
sB
SB
sB

ssBb:
sB
sb
sB
sb

So now that you know what to put on as the x and y for the Punnett Square, set it up:

 | SB | sB | SB | sB 
sB | SsBB | ssBB | SsBB | ssBB 
sb | SsBb | ssBb | SsBb | ssBb 
sB | SsBB | ssBB | SsBB | ssBB 
sb | SsBb | ssBb | SsBb | ssBb 

Now, listing each possible genotype and the number of times they show up in the square:
SSBB
0 times
SSBb/SSbB
0 times
SSbb
0 times
SsBB/sSBB
4 times
SsBb/SsbB/sSBb/sSbB/
4 times
Ssbb/sSbb
0 times
ssBB
4 times
ssBb/ssbB
4 times
ssbb
0 times

Since there are only 4 genotypes are possible, set up ratios of those four:

SsBB:
4 times/16 total = .25 = 25%

SsBb:
4 times/16 total = .25 = 25%

ssBB:
4 times/16 total = .25 = 25%

ssBb:
4 times/16 total = .25 = 25%

This means that the genotypes have a 25% : 25% : 25% : 25% likelihood.

Now, let's figure out the phenotypes of the 4 genotypes:
SsBB:
Ss = dominant
BB = dominant

SsBb:
Ss = dominant
BB = dominant

ssBB:
ss = recessive
BB = dominant

ssBb:
ss = recessive
Bb = dominant

So we have 2/4 that are S-dominant B-dominant and 2/4 that are S-recessive B-dominant.
This means that the phenotypes are:
2/4 = 50% Thin stripes with black eyes, and
2/4 = 50% Thin stripes with gray eyes.

I hope this helped you out :)

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Our earth is in constant nonstop motion

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