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kogti [31]
2 years ago
8

How might genetic variation arise?

Biology
1 answer:
Dvinal [7]2 years ago
6 0

Answer:

Genetic variations can arise from gene mutations or from genetic recombination (a normal process in which genetic material is rearranged as a cell is getting ready to divide). These variations often alter gene activity or protein function, which can introduce different traits in an organism.

Explanation:

your welcome

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What happens to the abundance of angiosperm and gymnosperm pollen fossils at the kt boundary?
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The KT boundary marks a mass extinction event. the KT boundary is the time between the Cretaceous and Tertiary periods. An asteroid hit the earth at the end of the Cretaceous and that caused the end of the Cretaceous period. Before the KT boundary, pollen from angiosperms and gymnosperms is high. After the meteor hits the earth, a mass extinction occurs and the amount of pollen from gymnosperms and angiosperms decreases dramatically, while the amount of spores from ferns increases. During the Cretaceous period there were many species of gymnosperms and angiosperms but they disappeared at the KT boundary, when the asteroid hit the earth. 
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Tissues are composed of the same kind of<br> a. bones <br> b. cells
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The right option is; a. It is rich in minerals from volcanic deposits.

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How can you tell the stigma
tatiyna

Answer:

Hello There!

Explanation:

The top of the pistil is the stigma. When mature the stigma is enlarged, and its surface is moist and sticky. The style is the middle portion of the pistil. It supports the sigma.

hope this helps good luck!

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