The photosynthetic membrane of Halobacterium salinarium contains ________.

A. archaeochlorophyll
B. bacteriorhodopsin
C. chlorophyll a and b
D. bacteriochlorophyll


Answer: B

Biology & Microbiology

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With metal pollutants, the best phytoremediation uses ____

a. hydrologic injections that dilute the groundwater b. chemical injections that degrade the pollutants c. plants that take up toxins and store them in aboveground tissues d. plants that prevent the toxins from being absorbed in their tissues e. plants that can breakdown the toxins and release them into the air

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Pcr

1.is a way of replicating DNA without using a cell. 2.uses two primers. 3.can produce large amounts of DNA very quickly. 4.avoids the use of vectors. 5.All of the options are correct.

Biology & Microbiology

Four of the five stimuli listed below evoke plant

tropisms. Select the exception. a. gravity b. touch c. mechanical stress d. light e. electrical current

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Hardy-Weinberg equilibrium will not occur in a population in which

A. mutations do not occur. B. individuals mate at random. C. natural selection does not occur. D. individuals immigrate or emigrate. E. sexual selection does not occur.

Biology & Microbiology