Answer:
Because the earth's axis is tilted. It is all about the tilt of the Earth axis.
Explanation:
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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.
Both lie in 1st column of the Periodic Table. (contain the members of the Alkali Metals. Members within a family, column, or elements tend to have similar<span> chemical properties.</span>