Answer:
If a cell can't control what enters and leaves its structure, harmful and foreign substances can get into the cell and obstruct cell activity.
Explanation:
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The answer is: B; allows more heat to be trapped in the lower atmosphere
A signaling pathway would need to be regulated because of efficiency, to make what you need when you need it.
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Answer: Darwin's theory of evolution, also called Darwinism, can be further divided into 5 parts: "evolution as such", common descent, gradualism, population speciation, and natural selection.
