Neurons in the higher vocal center of a male finch's brain are stimulated to proliferate by testosterone
Indicate whether the statement is true or false.
ANS: F, estrogen
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Chitin, a modified form of cellulose, is not only cross-linked with proteins but its glucose units are modified with atoms of:
A. nitrogen. B. hydrogen. C. oxygen. D. sulfur. E. phosphorous.
If a positive reaction is last observed at a dilution of 1:256, the titer is
A. 128. B. 1/512. C. 1/256. D. 256.
Vitamins
a. are organic substances. b. are inorganic substances. c. are required in small amounts for normal metabolism. d. are organic substances and are required in small amounts for normal metabolism. e. are inorganic substances and are required in small amounts for normal metabolism
If the world were to support the largest possible human population, all humans would need to be
A. carnivores. B. omnivores. C. herbivores. D. producers.