It’s B the other person put D but that’s the cell wall or cell membrane
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Answer AND Explanation:
Darwin describes natural selection as a process whereby nature selects those organisms that have favourable characteristics to be parents of the next generation. The individuals possessing the favourable traits are better suited to the prevailing environmental conditions. This enables them to stand a better chance to survive in the struggle for existence due to limited resources.
Answer:
A) the mantle
Explanation:
The mantle is between the crust and the outer core.
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Around 4.1 billion years ago the first single celled organism appeared
