Answer: To tell how the environment was years ago and what kind of animals were able to live there. Hope this helps.
Explanation:
True. A population can consist of human beings or animals in their distinct habitat
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The amu (atomic mass unit) of a proton and neutron are equal. The amu of the electron is significantly smaller than these.
There are only two main types of cells in nerve tissue. The actual nerve cell is the neuron. It is the "conducting" cell that transmits impulses and the structural unit of the nervous system. The other type of cell is neuroglia, or glial, cell.