What is the approximate global temperature 1,000 years ago

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.

Acommon kind of mechanical weathering is called

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur