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Biology

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cupoosta [38]2 years ago

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Every hiv particle contains two rna molecules. if two genes from one rna molecule become detached and then, as a unit, get attac

myrzilka [38]

Maybe, not sure, may need to check yahoo answers for this one

7 0

3 years ago

Crossing over contributes to genetic variation by exchanging chromosomal segments between:_____.

yulyashka [42]

Crossing over contributes to genetic variation by exchanging chromosomal segments between non-sister chromatids of homologous chromosomes.

What is crossing over?

Crossing over is the exchange and recombination of genetic components between the homologous chromosomes.
This occurs in the pachytene stage of the meiosis-1 of the meiotic division.
Crossing over occurs with the help of an enzyme and the enzyme responsible for crossing over is called Recombinase.

Thus, crossing over contributes to genetic variation by exchanging chromosomal segments between non-sister chromatids of the homologous chromosomes.

Learn more about crossing over: brainly.com/question/927405

#SPJ4

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2 years ago

If a plant cell contains more solutes than its surrounding environment, what will happen?

larisa [96]

The cell will incorporate solvent - water. When a plant cell contains more solutes than its surrounding environment it means that it is in a hypertonic state, the osmotic gradient will increase and the water will tend to enter the cell augmenting the t<span>urgor pressure inside the cell wall. Ultimately, it will cause water to enter the plant and reach the cell.</span>

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3 years ago

The Mesozoic Era is marked by dramatic evolutionary activity. What factor best set the stage for the dramatic development of ins

Reptile [31]

Answer:

The era is characterized by having one of the most diverse environment that the earth could have ever seen, as there were number of species of dinosaurs and there were different plant life as well, and the climate was not so cold to live for the different organisms.
As, the life on earth flourish even there were organisms found on large scale inside the arctic circle.While, the level of CO₂ increased inside the Mesozoic era. Along , with which the extinction of about 96 percent of life made it very difficult for the rest of the organisms to survive and thus there were now mutations happening inside the different organisms genome.Along, with that the way of reproduction was greatly changed inside the plants, as more effective form of flowering plants were evolved.
As, for the animals new species with the increase level of survival instinct were evolved from old simple ones across the globe.

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3 years ago

Meiosis and mitosis have different stages that share some similarities and differences. What

Ira Lisetskai [31]

Answer:

During meiosis Prophase I, crossing over occurs which increases genetic diversity.

Explanation:

5 0

3 years ago