As , when the earthworms crawl inside the soil , it gets holes by which air can enter the soil and the growth of plant is fast.
Answer:
its b sunlight
Explanation: because why would a plant grow according to pressure gravity or touch.
Description 2 describes a commensal symbiosis. The answer is D, commensalism.
Answer:
<em>If crossing over did not occur there would be no diversity among organisms.</em>
Explanation:
Crossing over and independent assortment are the two phenomena of meiosis by which genetic and physical diversity occurs. If crossing over did not occur then there would not be changes in the physical features of children. No physical diversity would be produced. Children would have the same physical features as the parents. Each chromosome would be identical to one of the parents and hence there will be reduced variations.
