The cell walls of most fungi are composed of
A. dentine.
B. chitin.
C. peptides.
D. glycerol.
E. cellulose.
Answer: B
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Club mosses
(a) are placed in the subphylum Pterophyta. (b) are so-called because of the social nature of the plants. (c) do not produce gametophytes. (d) are so-called because most produce strobili.
Three genes (A, B, and C) are in the same chromosome. The distance between A and B is 1 map unit, between B and C is 4 map units, and between A and C is 3 map units. The correct order of genes in the chromosome is:
A. A, B, C B. B, C, A C. C, B, A D. B, A, C E. A, C, B
Whereas the sense of taste is based on ________ (how many?) classes of taste receptors, the sense of smell has over ________ (how many?) different receptors for chemicals associated with odor
A) 5; 1,000 B) 20; 200 C) 150; 6 D) 10; 10,000 E) 500; 5,000
Most enzymes are:
A) nucleic acids. B) proteins. C) lipids. D) carbohydrates. E) vitamins.