Why are the walls of the ventricles more muscular than the walls of the atria?

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?