All of the following are adaptations that organisms in rocky intertidal zones use to avoid predators except
release of large numbers of eggs/sperm into the water during reproduction cycles

Release of large numbers of eggs/sperm into the water during reproduction cycles.

Explanation:

Adaptation may be defined as the change in the physical, physiological and chemical changes in the organisms that helps them to survive in their environment.

The organisms living in the rocky intertidal zone shows adaptations as they are more darker in color and has simple body organisation. The algae,crabs and snails live in the intertidal zone. They have small number of offspring that protect them from the predators.

Thus, the answer is release of large numbers of eggs/sperm into the water during reproduction cycles.

The answer is selectively permeable. Indeed, plasma membrane is a cell membrane that permits the pass fo some molecules through it and impede the pass of others. This is an important property of the cell membranes for the metabolism and equilibrium of the chemical reactions that happens in the cells.