What are the primary regulator units that control endospore formation?

A) allosteric proteins
B) antisense RNAs
C) riboswitches
D) sigma factors


Answer: D

Biology & Microbiology

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Speciation is the divergence of two populations from a common ancestor. How does it contribute to biological diversity?

A. Speciation increases biological diversity. B. Speciation decreases biological diversity. C. Speciation has no effect on biological diversity.

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True or false: Predator/prey relationships are always linear, with one species affecting only one other in the community

A. true B. false

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Early blood cells and germ cells that become gametes arise from the

a. allantois. b. amnion. c. chorion. d. umbilical cord. e. yolk sac.

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Cells move to new positions as an embryo establishes its three germ-tissue layers during _____

A) determination B) cleavage C) induction D) gastrulation

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