List in order the levels of cellular respiration, beginning with cell and ending at organism.

Explain nonnuclear inheritance. ~ ap biology

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 was the land like over 500 million years ago? what was under the sea?