A soluble greenish pigment is produced by
A. Serratia marcescens.
B. E. coli.
C. Pseudomonas aeruginosa.
D. streptococci.
C
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The intensity of an electrical impulse is reflected in the
a. frequency of action potentials. b. magnitude of action potentials. c. duration of action potentials. d. intensity of action potentials. e. the frequency and duration of action potentials.
Viral infections are not considered a risk factor for autosomal trisomy because a virus cannot affect human
chromosome arrangement. a. True b. False
Why are gymnosperms considered to be "naked seed" plants?
A) Their seeds have a thin layer of endosperm. B) They do not produce seeds; they produce only spores. C) Their seeds are not enclosed within ovaries. D) Their seeds develop on the surface of sporophytes.
Which statement is true regarding the size of an organism's genome and its complexity?
A) The larger the genome size, the more complex the organism. B) The smaller the genome size, the more complex the organism. C) Any organism with a genome size larger than that of an amoeba is considered "complex." D) Any organism with a genome size larger than that of a fruit fly is considered "complex." E) No apparent relationship exists between the size of an organism's genome and its complexity