What's protein synthesis?

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.

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Which is the best example of plant tissue? the answer is d (just took the test)