When would a model be most beneficial to a scientist? A. when a scientist wants to do a hands-on experiment

B. when a scientist wants to represent things that are either very large or very small

C. when a scientist wants to be creative

D. when a scientist doesn't want to confuse other scientists

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.

How do adaptation affect a species?

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation