What evolutionary advantage is provided by sexual reproduction?

a. increased genetic diversity
b. making clones
c. production of genetically identical offspring
d. making polyploidy possible
e. removal of all genetic mutations


a

Biology & Microbiology

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Which purine base forms 3 hydrogen bonds when binding its complementary nucleotide base?

A. guanine B. cytosine C. thymine D. uracil E. adenine

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Two species of spiny anteaters (echidnas) and the duck-billed platypus are the only known living members of the ____ mammalian lineage.

a. Strepsirhini b. monotremes c. Rodentia d. Haplorhini e. marsupials

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The most abundant lipids in the body are

a. oils. b. waxes. c. steroids. d. triglycerides. e. fatty acids.

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The primary effect of increasedPCO2 in the lungs is to cause ________ which ________ the ventilation-perfusion ratio back to a normal level.

A) bronchodilation : increases B) vasoconstriction : decreases C) vasoconstriction : increases D) bronchoconstriction : decreases E) vasodilation : decreases

Biology & Microbiology