What are some treatments for cancer? Select all choices that apply. A. removal by surgery
B. treatment with high-energy radiation
C. treatment with chemical compounds
D. removal by cyclins

What evidence is there that convection occurs in earth’s troposphere?

Dwarf galaxies are select one: a. relatively rare. b. not very bright c. mostly spiral shaped. d. none of these.

Which conditions are necessary for natural selection to occur? select all of the answers that apply. a. inheritable adaptations vary among individuals. b. the population size is increasing. c. more individuals are born than can survive. d. fitness varies among individuals. e. the environment changes suddenly and drastically.