The bacterial cell wall component, ________, is a long, polypeptide chain of NAM and NAG residues that provide the bacterial cell protection from lysis.

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


peptidoglycan

Biology & Microbiology

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In Bacteria, a chromosome can be distinguished from a plasmid, because a chromosome is a genetic element that

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The rate of background extinctions is calculated to be species per year per million species.

A. 0.1 to 1.0 B. 1.0 to 10 C. 0.001 to 0.01 D. 10 to 100 E. None of the answer choices is correct.

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Which of the photographs in the above figure

represents the bryophyte? a. moss b. fern c. conifer d. monocot e. all of these

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Which of the following are positive effects of prokaryotes and human interactions?

a. bioremediation b. decomposition c. gut mutualism d. A and B e. A, B and C

Biology & Microbiology