Which type of bacteria grows in either the presence or the absence of oxygen?
a. obligate aerobes and obligate anaerobes
b. facultative anaerobes only
c. obligate anaerobes and facultative anaerobes
d. obligate anaerobes only
Ans: b. facultative anaerobes only
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All environments have both ____ and ____ components
a. hydrospheric; lithospheric b. lithospheric; atmospheric c. ecologic; atmospheric d. biotic; abiotic e. organismal; ecologic
Some asteroids show evidence of surface activity such as lava flows
a. True b. False Indicate whether the statement is true or false
Which of the following purchases land and preserves it for ecosystems?
a. The Convention on International Trade in Endangered Species of Wild Fauna and Flora b. The Endangered Species Act c. The Nature Conservancy d. The Kyoto Protocol
Small single strand DNA molecules with a fluorescent molecule attached that are used to identify a clone containing a specific gene fragment is called a
A) primer. B) probe. C) plasmid. D) promoter. E) peptide.