The most reactive of the four toxic forms of oxygen is?
a. the hydroxyl radical
b. the peroxide anion
c. the superoxide radical
d. singlet oxygen
Ans: a. the hydroxyl radical
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You are planning a whitewater rafting vacation in Kenya. Based on what you know about microbiology, what precautions should you take to return in the best of health?
What will be an ideal response?
The Euryarchaeota includes all
A. known thermophilic extreme acidophiles. B. the bacteria. C. known methanogens. D. green sulfur bacteria.
Which of the following correctly lists organization levels from the simplest to the most complex?
a. atoms, organelles, cells, tissues, organs b. atoms, molecules, tissues, organelles, organisms c. molecules, atoms, cells, organelles, tissues d. molecules, cells, organelles, organisms, organs
A food web is a better representation of a community than a food chain because most interactions among organisms
A) are specialized between particular individuals. B) are diffuse across a range of contexts. C) are limited to trophic levels. D) are related to phylogenetic history.