In photosynthesis what substances come in from the outside

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.

What are the responsibilities of the region of the brain highlighted below? =+= will rate brainiest =+=

Which prefix mean under less or below