For a mutation to affect the evolution of an animal species, it must occur within

A) somatic cells. B) diploid cells. C) prokaryotic cells. D) gametes.


D

Biology & Microbiology

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A terrestrial mollusc without a shell belongs to which clade?

A) chitons B) bivalves C) gastropods D) cephalopods

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Most mollusks have a closed circulatory system in which hemolymph is confined within the walls of hearts and

vessels.

a. True b. False

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Duplicated chromosomes linked together at their

centromeres at the beginning of meiosis are appropriately called what kind of chromatids? a. mother b. daughter c. sister d. homologous e. haploid

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Most peptic ulcers are the result of colonization of the stomach by

A) Vibrio cholerae. B) Escherichia coli O157:H7. C) Shigella dysenteriae. D) Salmonella enterica. E) Helicobacter pylori.

Biology & Microbiology