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neonofarm [45]
3 years ago
8

If the stem of a plant is bent or snapped, why does the part above the bend usually die, even if it is propped up with a support

?
Biology
1 answer:
mezya [45]3 years ago
4 0
Plants have a vascular system (analogous to ours) made of Xylem, cells which bring nutrients from the roots to the leaves, and Phloem, cells that move sugar from the leaves to the rest of the plant. when you bend or snap the stem, these "veins" can be broken, and will no longer transfer nutrients to and from the upper part of the plant, even standing the stem back up will not reconnect these. and, like cutting off circulation to your hand, the part not receiving nutrients will soon shrivel and die.
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Round seeds and yellow seed color are dominant to wrinkled seeds and green seed color. What is the probability of having offspri
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Explanation:

Circular and yellow seeds are overwhelming and wrinkled and green seeds are passive. It is vital to keep in mind that resective characteristics are as it were displayed when the sibling has two passive alleles for those characteristic, in the event that the descendant includes a latent allele and a overwhelming allele, the characteristic that will be presented is the overwhelming one. For this reason, able to say that a cross between RRYY x RrYy plants, would not create any descendant with wrinkled and yellow seeds. Typically since, the descendant of a crossing, must show an allele of each parent. One parent as it were has overwhelming alleles (RRYY), so able to say that all descendant will get 1 overwhelming allele for color and a overwhelming allele for seed surface, anticipating the sibling from communicating latent characteristics.

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