If a set of genes is induced in the presence of the controlling substance, it is referred to as ________ control.
Fill in the blank(s) with the appropriate word(s).
positive
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Parathyroid hormone causes the blood calcium level to rise, but calcitonin causes those levels to fall. The relationship between the two hormones is described as ________
A) expressive B) antagonistic C) synergistic D) permissive
Dogs scent-mark by defecating and urinating in an area, while cats scent-mark by rubbing against objects. Both of these increase the animals level of fitness and are examples of
A. sexual selection. B. altruism. C. territoriality. D. foraging.
Wernicke's area _____
A) is active when speech is heard and comprehended B) is active during the generation of speech C) coordinates the response to olfactory sensation D) is found on the left side of the brain
Which of the following is NOT used as a criterion to classify viruses?
A) biochemical tests B) morphology C) nucleic acid D) size E) number of capsomeres