Answer:
The behavior of chromosomes during meiosis and fertilization is responsible for most of the variation that arises in each generation. Three mechanisms contribute to genetic variation arising from sexual reproduction: independent assortment of chromosomes, crossing over, and random fertilization.
D. Ability to read
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Turner syndrome occurs among the females only because it has to do with the missing X chromosome. The effects of this syndrome is having a short height, ovary failure and heart defects. The female sex hormones, such as the estrogen and progesterone, are elevated.
Answer:
<em><u>mutualism</u></em>
As Mackenzie told us, the mutualism between strawberry poison dart frogs and bromeliads is “evidence of the complexity that exists in the biological world and the interconnectedness of species.”
Explanation:
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Plants have cell walls, so cytokinesis cannot go on with a cleavage furrow, but instead, a cell plate forms across the cell in the location of the metaphase plate.
There is no distinct groove along the cell plate as the cell divides because of the rigid nature of the cell plate or new cell wall.
A plant cell divides differently from an animal cell which forms a clear cleavage furrow because it only has a flexible cell membrane and not a rigid cell wall like plants.
The cell plate in plant cells is formed by membrane bound vesicles which migrate to the center of the cell where the metaphase plate used to be and fuse together to form a cell plate.
