Prokaryotes differ from eukaryotes because:

a. they do not have a nucleus
b. they do not produce rna
c. they have a plasma membrane
d. they are single-celled

Which would be an adaptation in a rainforest, but not in a tundra? a. ability to store water for a long time b. fur that blends in with snow c. strong claws for killing prey d. a beak that can dig into thick trees

Facilitated diffusion move large molecules and/or polar molecules across the cell membrane. what does facilitated diffusion use to do this?

Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?