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olchik [2.2K]
3 years ago
11

A scientist is studying changes in the genetic material that affect the traits of an individual. In which part of the cell must

the scientist focus her studies?
Biology
1 answer:
likoan [24]3 years ago
3 0

Answer:

nucleus

Explanation:

Since the nucleus of the cell contains DNA (genetic material), she must focus on the nucleus.

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In which biome would you most likely find plants that exhibit C4 or CAM photosynthesis?
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Which are characteristics of leeches? Check all that apply.
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They are parasitic.

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Which of the following statements about rural communities is true? a. Rural communities can support any population size. b. More
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8 0
3 years ago
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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