Which enzyme is required to pass G2 M phase and G1 S phase in cell cycle?​

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

What is true of sea slugs in these orders