Which of the following traits is NOT characteristic of Caulobacter?

A) abundant in aquatic habitats rich in nutrients
B) produces a cytoplasmic outgrowth (prostheca)
C) attaches to surfaces in nature
D) asymmetric cell division


Answer: A

Biology & Microbiology

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If 100 females produce 50 offspring, the age specific fertility rate is

A. 0.75. B. 0.5. C. 2. D. 50. E. impossible to calculate with this information.

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Donor cells in conjugation are labeled ____ cells, whereas recipient cells are labeled ____ cells

a. F+; Fb. F+; F+ c. F-; F+ d. F1; F2 e. F+; F2

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Which of the following statements is false?

a. HIV is the virus that causes AIDS. b. The AIDS virus is a retrovirus. c. The AIDS virus attacks macrophages, dendritic cells, and helper T cells. d. HIV has several target cells e. IgA antibodies can keep HIV levels low for decades.

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The process by which some bacteria convert nitrate to atmospheric nitrogen gas is called ________

Fill in the blank(s) with correct word

Biology & Microbiology