Which of the following is an example of an ultimate cause of animal behavior?
A. Variation in hormone receptors governing promiscuity in rodents
B. Competition for food resulting in the larval foraging behaviors of fruit flies
C. Social environment determining the dominant role in male cichlids
D. Phenotypic variation in response to water depth in fish
E. Conditioned response in animals
Answer: B
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A. frameshift B. point C. silent D. back
Members of the genus Mycobacterium cause which of the following diseases in humans?
A. Tuberculosis and leprosy B. Abscesses C. Meningitis D. Diphtheria
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a. primary spermatocytes b. secondary spermatocytes c. spermatids d. mature sperm e. a zygote