Fins composed of rod-shaped bones surrounded by thick layers of muscle are characteristic of
A) lobe-finned fishes.
B) ray-finned fishes.
C) lampreys.
D) cartilaginous fishes.
E) hagfishes.
A
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Four of the five answers listed below are
events that lead to secondary succession. Select the EXCEPTION.
a. opening the canopy in a tropical rain forest b. abandoning a cotton field c. retreat of a glacier in Alaska d. the finish of a fire e. growth of weeds in a lawn that is not mowed
The components of membranes that account for
most of their active functions are a. carbohydrates. b. sterols. c. proteins. d. fats. e. phospholipids.
The fungi that cause serious plant disease, such as Dutch elm disease and chestnut blight, belong to the phylum
A. Glomeromycota. B. Actinomycetes. C. Ascomycota. D. Basidiomycota. E. Zygomycota.
The formation of citric acid from oxaloacetic acid and an acetyl group begins
A. the electron transport system. B. fermentation. C. glycolysis. D. oxidative phosphorylation. E. the Krebs cycle.