How many chromosomes do parent frogs give to offspring , each.

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.

When analyzing tree rings, what do scientists assume a thin ring indicates?

Greenthe fossil record is the history of life recorded byhuman observationgod.climatologists.remains of the past.