Inbreeding is primarily due to ____
a. gene flow
b. nonrandom mating
c. neutral mutations
d. natural selection
e. adaptive radiation
ANSWER: b
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You prepare the first ever karyotype of an endangered species of frog. Upon examination you find that all the chromosomes are metacentric. This is going to make it difficult to identify
A. which is the p arm of the chromosome. B. which is the q arm of the chromosome. C. the unique G banding for each chromosome. D. if the chromosomes are telocentric. E. both the p and q arms of the chromosome.
In arid terrestrial environments, salt can accumulate in the soil because of
A. the selective uptake of water by plants. B. the activities of grazing animals. C. the precipitation of salt from dry air. D. the secretion of salt by plants. E. the settlement and evaporation of water.
Gymnosperms and angiosperms evolved ____ allowing them to live and reproduce in drier habitats than bryophytes and seedless vascular plants.
A. spores B. seeds, spores, and fronds C. vascular tissue, spores, and fronds D. pollen grains and seeds E. fruit and flowers
If you were given the task of choosing a biological control agent for a reed from eastern China that has become invasive in the southeastern United States, what do you think would be the best choice? Consider both the effectiveness and the safety of the agent you be releasing.
A. A fungal pathogen from eastern China that specializes on the reed and can kill a plant in a few months. B. A generalist beetle, native to the United States, that can consume massive quantities of the reed in a few weeks. C. A nematode, native to eastern China, that specializes on the reed but can take up to two years to kill a plant. D. A caterpillar, native to the United States, that normally eats close relatives of the weed, but has been found in lab trials to perform better on the Chinese reed.