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Experiments on the feeding preferences of newborn garter snakes born to coastal vs. inland California revealed that even in the same species, differential instinctive responses can be ____.


A) learned
B) genetic
C) forgotten
D) homozygous
E) sex-linked

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When researchers studied knockout mice with no active copies of the Dvl1 gene, they found these mice were____.


A) physically abnormal
B) socially normal
C) not easily startled
D) physically and socially normal
E) physically normal, but socially abnormal

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Why do peahens choose peacocks with the longest, showiest tails, when a long tail might be easily grabbed by a predator?

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Studies have shown the ability to surviv...

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What is an example of an ultimate cause of animal behavior?


A) physiological
B) cellular
C) genetic
D) anatomical
E) adaptive

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What symptoms are shared by knockout mice with nonfunctional DvII genes and humans with certain psychiatric disorders?

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Knockout mice with nonfunctional DvII ge...

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The zenk gene in the zebra finch brain is activated by tactile stimuli.

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In African cichlid fish, ____ regulates neurons that control sexual and aggressive behavior.


A) testosterone
B) estrogen
C) androgen
D) gonadotropin-releasing hormone
E) follicle-stimulating hormone

Correct Answer

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