What type of river channel is characterized by multiple channels and gravel bars?
A) meandering
B) riffling
C) pooling
D) braided
D
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The lithosphere is a plastic material; the asthenosphere is a brittle material.
Indicate whether the statement is true or false.
Language trees represent the relationships of words in a language to each other
Indicate whether this statement is true or false.
A species has evolved an asexual mode of reproduction by having offspring develop from unfertilized eggs. Which of the following will be true of this species' response to natural selection?
A) The species will increase in numbers because genetic variation is increased. B) The species will compensate for loss of genetic variation by hybridizing with other species. C) There will be fewer deaths from natural selection because sexual recombination always leads to extinction. D) There will be less genetic variation from sexual recombination and a risk of not adapting quickly to environmental change. E) There will be more deaths from natural selection because there is no mutation.
Which of the following statements about monoculture farming is true?
A) Monoculture farming is an agricultural practice that increases a crop's susceptibility to insect pests. B) Monoculture farming prohibits the use of crops that have been genetically modified. C) Because of the risk of environmental degradation, monoculture farming is illegal in the United States. D) Monoculture farming prohibits the use of synthetic fertilizers and pesticides.