How do mutations lead to variation?

A.

by signaling proteins to be synthesized

B.

by producing changes in the genetic code

C.

by giving organisms new features for survival

D.

by providing a source of energy for cells

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In early pregnancy, what hormone stimulates growth of the corpus luteum? human chorionic gonadotropin follicle-stimulating hormone human chorionic somatomammotropin adrenocorticotropic hormone progesterone

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The aorta is a vein. True False

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