There are three aspects of entire populations that are important and often studied. Select the best choice from the ones listed.
A. a population's range, the pattern of spacing of individuals within the range, and the size that the population attains
B. a population's range, the amount of food available within the range, and the size that the population attains
C. a population's range, the parental care received by each offspring within the population, and the size that the population attains
D. a population's range, the size home range of an individual in the population, and the parental care expended for each offspring
A. a population's range, the pattern of spacing of individuals within the range, and the size that the population attains
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The various endemic cichlid species of Lake Victoria have suffered losses in their population numbers and species due to the introduction of
A. the Nile crocodile. B. the Nile perch. C. a new algae species. D. a new ectoparasite that lives on the gills. E. a fish hawk.
The plant hormone that coordinates the effects of other plant hormones during development of shoots and roots is
____.
a. auxin b. gibberellin c. cytokinin d. abscisic acid e. ethylene
Living cells are required for culturing viruses because
A) viruses are technically nonliving. B) viruses require host cell genetic machinery to replicate. C) viruses are obligate intracellular parasites. D) All of the choices are correct.
Mountain, basin, and hybrid sagebrush were each raised in the three different habitats where they are found. What is likely to happen to the hybrid zone?
a. It will disappear because the basin population will move up the mountain and replace the hybrids. b. It will disappear because the mountain population will move down the mountain and replace the hybrids. c. It will disappear because the basin population will move up and the mountain population will move down the mountain and replace the hybrids. d. It will persist because the hybrids have the highest fitness in the hybrid zone.