These organisms most specifically utilize light energy to make organic molecules from inorganic molecules.
A. photoautotrophs
B. photoheterotrophs
C. photoisotrophs
D. photohemitrophs
E. heterotrophs
A. photoautotrophs
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In a survey of Dall mountain sheep in Denali National Park in Alaska, researchers found that wolves preyed primarily on the most vulnerable members of the population, the young and the old. What conclusion is best supported by this data?
A. A limited program should be established to cull the sheep population. B. Wolf predation would not be expected to dramatically reduce the sheep population. C. The wolf population is at its carrying capacity, so it is no threat to the sheep population. D. A limited program should be established to cull the wolf population. E. Dall mountain sheep in Denali are an r-selected population.
A(n) ________ cross yields a genotypic ratio of 121 and a phenotypic ratio of 31.
A) allelic B) monohybrid C) test D) dihybrid
What term describes the failure of one species' sperm to fertilize the egg of a different species?
A) Hybrid weakness B) Gametic incompatibility C) Mechanical incompatibility D) Mating time differences
What type of relationship is it when two or more kinds of organisms live together in often elaborate and more or less permanent association?
A. Mutualistic B. Synergistic C. Parasitic D. Symbiotic