Checkpoints in the cell cycle control system _________.

Fill in the blank(s) with the appropriate word(s).


Answer: regulate the cell cycle through a variety of stop and go signals

Biology & Microbiology

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In dry weather, plants reduce water loss by closing their

A. gap junctions. B. stomata. C. cell membranes. D. None of the answer choices is correct. E. vascular tissues.

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Which of the following digestive system structures is greatly expanded in size in koalas, resulting in a very large surface area for prokaryotes to digest plant material?

A) stomach B) rumen C) cecum D) gall bladder

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A lipid membrane is present in which of the following?

A. naked viruses B. enveloped viruses C. prions D. viroids E. both prions and viroids

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The presence of a loop of Henle in nephrons is an evolutionary adaptation that enables mammals and birds to reabsorb water efficiently and produce a ________ urine.

A. hypertonic B. hypotonic C. isotonic D. osmolar

Biology & Microbiology