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Liono4ka [1.6K]
3 years ago
6

Which process could occur in maple trees to decrease the chromosome number in pollen cells from 52 down to 26?

Biology
1 answer:
andrew11 [14]3 years ago
4 0

Answer:

Meiosis

Explanation:

In a process of meiosis a sing cell divides twice to produce four daughter cells which contains half the amount of. genetic information These cells are sex cells. These four daughter cells consists of half the number of chromosomes of the parent so they are haploid. This is the reason in maple tree the chromosome decreased from 52 to 26.

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What blood vessel is a tributary of the hepatic portal vein?
inysia [295]

According to the research, the linear vein is a tributary blood vessel of the hepatic portal vein.

<h3>What is the hepatic portal vein?</h3>

It is a blood vessel that carries deoxygenated blood from the digestive organs and the spleen to the liver.

The linear vein is one of the branches of the celiac trunk that supplies the spleen and gives off branches to the stomach and pancreas.

Therefore, we can conclude that according to the research, the linear vein is a tributary blood vessel of the hepatic portal vein.

Learn more about the hepatic portal vein here: brainly.com/question/15511202

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7 0
2 years ago
Most _______________ are vertebrates that have a well-defined head and backbone, plus an internal skeleton made up of bone or ca
kipiarov [429]
The answer is Chordates

Chordates belong to the pylum Chordata of the Animal Kingdom.They have the following characteristics;
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8 0
3 years ago
Why is it very unlikely for a frameshift mutation to be a silent mutation?
never [62]
When a frameshift mutation occurs, the string of DNA will be glued together. When this DNA is going to be part of a process, such as a transcription, whatever is causing the process is unaware of the mutation actually having happened.
3 0
3 years ago
Read 2 more answers
Which Mechanism of microevolution caused the the beak of the medium gound finch population on dafne major to increase in size in
expeople1 [14]

Answer:

Natural selection

Explanation:

Microevolution refers to changes produced at a lower level than species. In genetics, microevolution is the change in the allelic frequency perceptible in a few generations. Most of these naturally produced changes by mutation, natural selection, genetic flux, genetic drift.

After the drought on Daphne Major, many of the plants producing small-sized seeds decreased their reproductive rate drastically. Consequently, there were almost no seeds available for the medium ground finch to feed. The population of this species also decreased to only a hundred birds over two years. Weather conditions and food availability influenced the survival of the animals.

With time, the finched population increased again, but now, the average size of the beaks was larger. The trait modification was related to the availability of only larger seeds with thick husks.

Eating large seeds with medium or small-sized beaks was impossible, so Finches needed to adapt, developing larger beaks to crack open the husks and eat the contents of the seeds.

<u>Natural selection was responsible for the rapid change in the finches´ population beaks size after the drought. </u>The evolutive force modifies the allelic frequencies, increasing the frequency of genetic variants that expressed the larger beak size and declining the frequency of the alleles that expressed smaller beak size.  

3 0
3 years ago
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kolezko [41]

Answer:

This is an experiment question sheet, which means you have to actually do the experiment to get the answers.

Explanation:

I was in biology and had to do one of these.

7 0
3 years ago
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