3. Choose the best answer. The theory that all evolution is slow and proceeds at a steady rate over a long period of time is?
A. speciation
B. gradualism
C. genetic drift
D. punctuated equilibrium

Sweating and breathing is an example of differentiation specialization maintaining homeostasis metabolism

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.

The terrestrial planets are characterized by having a a.) silicate core b.) iron-rich silicate core c.) iron-rich metallic core d.) none of these