<span>The growth of plants is regulated
by plant hormones. Some of the major hormones include; auxins, gibberellins,
ethylene, abscisic acid, and cytokinin. Abscisic acid is a stress hormone that
inhibits the growth of seeds during the scarcity of water such as during
winter. Ethylene hormone promotes ripening of fruits. The hormone can exist in gaseous
form and therefore if exposed to unripe fruits can induce ripening. Auxins promote apical growth while gibberellins
promote internodal growth in stems </span>
Answer:
1 Answer. Matthew T. Both natural selection and genetic drift are mechanisms for evolution (they both change allele frequencies over time). The key distinction is that in genetic drift allele frequencies change by chance, whereas in natural selection allele frequencies change by differential reproductive success.
Explanation:
1 Answer. Matthew T. Both natural selection and genetic drift are mechanisms for evolution (they both change allele frequencies over time). The key distinction is that in genetic drift allele frequencies change by chance, whereas in natural selection allele frequencies change by differential reproductive success.
When something is symmetrical it means that, if you were to cut it perfectly in half, each side would be like a perfect mirror image of the other side.
Or folding the halves together would match perfectly.
I hope this helps!