In plant cells, DNA molecules are found inside which structures? (Select all that apply.)
A) the nucleus
B) the mitochondrial matrix
C) the chloroplast stroma
D) the cytoplasm
E) the space between the inner and outer mitochondrial membranes
A) the nucleus
B) the mitochondrial matrix
C) the chloroplast stroma
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Gas gangrene is so named due to the formation of
A. carbon dioxide. B. oxygen. C. hydrogen. D. carbon monoxide. E. carbon dioxide AND hydrogen
The key chemical messenger responsible for increasing cardiac output when animals are exercising or under certain stresses is
A. epinephrine. B. acetylcholine. C. dopamine. D. serotonin. E. glutamate.
Bony fishes possess two features not found in other fish. Select the best choice from those listed below to complete the following sentence. Bony fishes have
A. swim bladders and gill covers called opercula. B. swim bladders and a complete digestive system. C. swim bladders and a closed circulatory system. D. swim bladders and movable jaws.
An example of an ecosystem “good” is __________, and an example of an ecosystem
“service” is __________.
a. cleansing of air; cleansing of water b. food; storage of minerals c. storage of minerals; food d. tourism; medicines