The main purpose is protection. The lipid bilayer protects the cell from viruses and other threats to the cell. It also maintains homeostasis within the cell by monitoring the amount of substances the enter or exit the cell.
Those skeletal remains were most found in South Africa.
A genetic mutation this is because albinism is a genetic disorder
The mass extinctions that occurred 250 million years ago and 65 million years ago may have been due to gradual process or <span>Catastrophic events.
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I believe you are looking for a man made lake or reservoir.