Natural selection<span> is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.</span>
Answer: Membrane transport proteins are specific and selective for the molecules they move, and they often use energy to catalyze passage. Also, these proteins transport some nutrients against the concentration gradient, which requires additional energy.
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Answer:
I would say it begins to multiply based on the picture below
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Biosphere- where living things exist
hydro- referring to just the water
geosphere-referring to entire thing
atmosphere- the gases in the air