Which of the following is an organic growth factor?
A) glucose
B) vitamin B1
C) peptone
D) Mg+2
E) H2O
B
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What is the result of successful communication between rhizobia and their plant hosts?
A. Rhizobia consume the plant tissue as an energy and carbon source, causing disease in the plant. B. The plant supplies organic forms of nitrogen to the rhizobia. C. The plant consumes rhizobiaas an energy source and carbon, destroying the invading bacteria. D. The rhizobia invade the plant root and begin to fix nitrogen with the assistance of the plant.
Which of the following characterize the Calvin cycle?
A. Produces oxygen B. Produces glucose as an end product C. Produces carbon dioxide and water D. A process that requires light E. Nitrogen is fixed into an organic form
Lederberg and Tatum's experiments demonstrated that
A. bacteria can acquire genetic material from each other. B. bacteria do not release DNA into the environment for other bacteria to take up. C. bacteria must be in physical contact in order for bacteria to exchange genetic material. D. the genetic transfer occurred when the bio+, met+ phe-thr- strain transferred DNA to the bio-met- strain. E. All of these observations were made by Lederberg and Tatum.
The organ of Corti
a. functions in the awareness of motion and the sense of equilibrium. b. controls the sense of depth perception. c. converts sound vibrations into impulses that enable hearing. d. secretes cerebrospinal fluid. e. detects light energy.