C. proteins-
The cytoskeleton is what provides structural support for a cell, and the cytoskeleton is made out of fibrous proteins.
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Answer:
Acquired immunity is immunity you develop over your lifetime. It can come from: a vaccine. exposure to an infection or disease. another person's antibodies (infection-fighting immune cells
Biogeochemical cycles are important because they regulate the elements necessary for life on earth by cycling them through biological and physical aspects of the word.