In which case would facilitated diffusion be needed? A. With very small non polar particles moving down the concentration gradient. B. With very small polar particles moving against the concentration gradient. C. With large polar molecules moving against the concentration gradient. D. With large non polar molecules moving down the concentration gradient.

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.

Will mark branliest. the theory of plate tectonics was developed with the contribution of scientists from many different disciplines. which of the following is a contribution from geophysicists?

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions