c<span>: The interdependence of body systems is essential because all systems work together to maintain homeostasis.</span>
Answer:
Within a protein, multiple amino acids are linked together by peptide bonds, thereby forming a long chain.
<span>Cattle and sheep are exposed to lead and zinc when these poisons are in the grass/soil.
Cattle and sheep graze on the grass, and thus they intake these minerals, such as lead and zinc when they come in contact with grass or earth they may eat along with grass. Thus they are exposed to them via eating.
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I believe another term for Natural Selection, based off of the answers provided, I would say C, Survival of the Fittest.
