Clumped dispersion is often influenced by:
a. the presence of strange groups.
b. sexual reproduction in plants or invertebrates.
c. unlimited seed dispersal in plants.
d. a patchy distribution of resources.
e. homogenous environments
d
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In the anammox process ________.
A. nitrogen gas is evolved B. all reactions must take place in the absence of O2 C. anaerobic oxidation of ammonia is coupled to the reduction of nitrite D. All of the choices are correct.
Which of the following best describes a dead cell as a system?
a. It is a closed system that exchanges energy with its surroundings. b. It is an open system that exchanges energy with its surroundings. c. It is an isolated system that does not exchange energy or matter with its surroundings. d. It is a closed system that
Which of the following are accurate descriptions of the properties of water? (select all that apply)
A. Water molecules are polar, and thus dissolve other polar or ionic substances. B. Water molecules are nonadhesive, tending to repel each other forcefully, resulting in a low surface tension. Water molecules are nonadhesive, tending to repel each other forcefully, resulting in a low surface tension. C. Water shrinks when it crystallizes, and ice is more dense than liquid water. D. Water's high heat of vaporization makes evaporation an effective way for many organisms to shed excess heat.
In a two-point cross to map genes A and B, you obtained 98 recombinant types and 902 parental types among the offspring. How far apart are these genes?
A. .098 cM B. 90.2 cM C. 9.8 cM D. 9.02 cM E. 0.98 cM