Which of the following combinations of organisms could be expected to survive in isolation from
other forms of life available?
a. producers and decomposers
b. producers and carnivores
c. carnivores and decomposers
d. herbivores, carnivores, and decomposers
e. producers, herbivores, carnivores, and decomposers.
A
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In what types of organisms do plasmodesmata serve as a mechanism of cell-cell communication?
A. protists B. plants C. those types of organisms that spend only a portion of their life cycle in a multicellular state D. animals
Lake Victoria is famous for its variety of cichlid fishes. In fact, they offer the most diverse assembly of vertebrates presently known to science. One trait that scientists have focused on as one possible reason for their adaptability is
A. a second set of scales that lie beneath the top outermost scales. B. a second set of jaws in their throats. C. gill arches that are not covered by an operculum, which prevents hiding places for gill parasites. D. digestive tracts that are able to process most substrates, which has eliminated the need for feeding specialization. E. ability to change color in relationship to their environment.
The soil horizon in which leached mineral particles such as clay and salts tend to accumulate is the
A) A horizon. B) B horizon. C) C horizon. D) O horizon.
Which of the following molecules has the most potential energy?
A. Pyruvate B. Acetyl CoA C. Glucose D. CO2