Microbes such as Geobacter metallireducens obtain energy from organic matter under anaerobic conditions by using MnO2 as a/an ________ ________.
Fill in the blank(s) with the appropriate word(s).
electron acceptor
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One widely used cladistic method of examining evolutionary relationships is ________, which is based on the assumption that evolution is most likely to have proceeded by the path requiring fewest changes
A) topology B) neighbor joining C) parsimony D) systematics
After which stage or phase of the cell cycle does cytokinesis occur?
A) M phase B) G1 C) G2 D) S E) G0
Clostridium botulinum is a strict anaerobe; that is, it is killed by the molecular oxygen (O2) present in air. Humans can die of botulism from eating foods in which C. botulinum is growing
How does this bacterium survive on plants picked for human consumption? Why are home-canned foods, as opposed to store bought cans, most often the source of botulism?
Conservationists have identified 25 areas worldwide as hotspots. This means these areas
A. have the highest numbers of invasive species worldwide. B. have serious pollution problems and are being targeted for cleanup. C. are currently being preserved. D. have high numbers of endemic species, and those numbers are increasing. E. have high numbers of endemic species, and those numbers are decreasing.