Although Darwin did not realize it, the variation he observed among individuals of a population of the finches was caused by what?

Plants that have reproductive structures called cones are?

Which statement best compares aerobic and anaerobic respiration

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b.diffusion c. endocytosis d. exocytosisc. endocytosis