Plasma membranes are selectively permeable. this means that

a)anything can pass into or out of a cell as long as the membrane is intact and the cell is healthy.
b)plasma membranes must be very thick.
c)the plasma membrane allows some substances to enter or leave a cell more easily than others.
d)glucose cannot enter the cell.

The nursing instructor has been observing nursing students initiate an iv infusion. which action(s), if made by the nursing student, indicates that further instruction is needed? (select all that apply.) the nursing student:

What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.

Which factor that affects biodiversity?