If a behavior has evolved by natural selection, it must have ________.
A. evolved the same way in each species
B. a genetic basis
C. reduced the predation rate on the animal
D. benefits for both males and females
Answer: B
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The ____ functions as the body’s thermostat
a. glands b. muscles c. brain stem d. sensory receptors e. hypothalamus
Sexual dimorphism occurs when males and females are so similar morphologically that they are difficult to distinguish
Indicate whether the statement is true or false
The formation of _____ depends on gene action, interactions within the embryo, interaction with other embryos that
may be in the uterus, and interactions with the maternal environm Fill in the blank(s) with the appropriate word(s).
Vibration of the ________ bends hairs of the hair cells, which ultimately generate impulses in ________
A) basilar membrane; hair cells B) sensory neurons; tectorial membrane C) hair cells; sensory neurons D) organ of Corti; hair cells E) basilar membrane; sensory neurons