Key mechanisms of horizontal gene transfer include all of the following except
A) transformation.
B) transposons.
C) reproduction.
D) conjugation.
E) transduction.
Answer: C
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The cell wall of Gram-positive bacteria
A. contains a thin layer of peptidoglycan. B. contains a thick layer of peptidoglycan. C. is, due to its thickness, an excellent barrier to most molecules. D. contains an outer membrane containing LPS. E. contains a thin layer of peptidoglycan AND contains an outer membrane containing LPS.
Vitamins ____ are produced within the human body
a. A and C b. A and D c. C and D d. C and K e. D and K
Which of the following is least likely to be considered a mutualistic relationship?
a. Bacteria living in the roots of pea plants b. Bird nesting in a tree. c. Cyanobacteria living inside of an eukaryotic cell. d. Clownfish living in the tentacles of an anemone. e. Fungi living in the roots of plants.
In Yellowstone National Park, hot springs can reach temperatures of 205°F (96°C). Despite these high temperatures, Aquifex bacteria flourish. How might you classify Aquifex bacteria?
A) slime molds B) extremophiles C) amoebas D) algae