Which group of bacteria uses oxygen as a terminal electron acceptor and grows well in ambient air?
a. Aerobes
b. Anaerobes
c. Capnophiles
d. Microaerophiles
A
Various types of microorganisms require different atmospheric conditions. Aerobes grow best in the presence of ambient air.
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The nonselective movement of water and a number of solutes into excretory system tubules is called --____
a. reabsorption b. excretion c. filtration d. secretion e. diffusion
The extraembryonic membrane that secretes fluid around the developing embryo is the ____
a. allantois b. amnion c. chorion d. yolk sac e. both the allantois and the yolk sac
HIV cannot be transmitted sexually
a. true b. false
Opening and closing of the stomata:a
occur during prolonged periods of drought. b. occur when there is a high concentration of carbon dioxide in the leaf. c. are under hormonal control
d. are triggered by darkness. e. are controlled by the changes in shape of the companion cells.