As a control, the unshaved shrews would have to be handled by researchers but would not have to see a razor.
a. true
b. false
Ans: b. false
(Everything about the treatment should be the same, except that the razor should have something to block the blades from cutting hair. Shrews should be handled for the same time, while seeing, feeling, and hearing the razor. Otherwise, one cannot tell whether the stress of shaving, rather than the loss of hair, caused a change in physiology.)
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You observe a chimpanzee use a stick to dig termites out from a nest. How could you determine if this digging behavior is learned or innate?
A. Take the stick away and see if the chimp picks up another one. B. Show the chimp termite mounds of different sizes and see which one he/she chooses for digging. C. Provide the chimp with lots of different foods and see if he/she still digs for termites. D. Raise chimps in isolation from other chimps and see if the chimps still exhibit the behavior. E. Raise chimps in groups and see if the chimps still exhibit the behavior.
Which structure becomes part of the placenta?
a. chorion b. amnion c. blastocoel d. yolk sac e. allantois
Interneurons are found in the
a. dorsal root. b. spinal cord. c. sensory neurons. d. motor neurons. e. somatic system.
The figure below shows five water molecules. The hydrogen bonds shown in this figure are each between
A) two hydrogen atoms.
B) an oxygen and a hydrogen atom of the same water molecule.
C) an oxygen and a hydrogen atom of different water molecules.
D) two atoms with the same charge.