For a cell to maintain the appropriate balance of materials inside and outside of the cell, materials must be able to move in and out of the cell. the degree in which materials are able to flow freely through a cell's membrane is known as

the answer to your question is b

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.