An example where space would be a limiting factor would be this: Wolves live in a very good habitat for them - there are plenty of animals to be found and eaten. However, because their current habitat is rather limited, they cannot expand beyond a certain size because otherwise they would interfere with the habitat of each other and also reduce the amount of necessary food in the environment.
If the herring was eaten by something that either ate or was being eaten by the gulls, then they would be affected differently. If the gulls had less food because there food source had less food if the herring disappeared, then they would have a lower or population of perhaps become extinct. If the thing eating the herring became extinct because it had less food, then the gulls population would increase and either boom and bust or grow and level out once they reached the carrying capacity.
Answer
<em>According to ThoughtCo,</em>
<em>The cell membrane (plasma membrane) is a thin semi-permeable membrane that surrounds the cytoplasm of a cell. Its function is to protect the integrity of the interior of the cell by allowing certain substances into the cell while keeping other substances out.</em>
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<em>Hope this helps! <3</em>
It penetrates the skin and can cause mutations.