Group of three nucleotide bases in mrna

What does it mean for a cell membrane to be selectively permable

Why is excretion necessary to maintain homeostasis?

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.