One species of fish feeds in the muddy bottom of a lake. A second species eats insects that land on the water surface. This is an example of
A) mechanical incompatibility.
B) behavioral isolation.
C) ecological isolation.
D) geographic isolation.
E) temporal isolation.
C
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From the plant's perspective, which term best describes carbohydrates in the context of symbiotic relationships with bacteria?
A. a renewable resource B. a loss of energy C. a source of NH3 D. a source of N2
Phanerochaete chrysosporium:
A. is a wood-decay fungus that is used to bleach paper and decompose dioxin B. is a lichen that serves as food for reindeer C. is the cause of lung disease D. is an hallucinogenic mushroom E. is a rust that causes oak trees to shed their leaves prematurely
Reef-building polyps get their sugars from mutualistic ____
a. green algae b. cyanobacteria c. dinoflagellates d. roundworms e. planarians
What kind of bond is formed between complementary base pairs to join the two DNA strands into a double helix?
A) ionic bond B) phosphodiester bond C) hydrogen bond D) disulfide bond E) peptide bond