The answer is B.The respiratory system supplies the oxygen that the cardiovascular system transports to the different cells for the production of energy.
Answer that does not describe the structure of an atom: The electron clod is a small and compacted space around the nucleus.
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Answer: Reproductive problems from imbalanced hormones can occur when abnormal levels of estrogen and androgen sex hormones develop, and can cause infertility and other health issues.
Lipids have no polymers.
A lipid is formed when a glyceral combines with one or more fatty acids.
