Tinbergen is credited with founding the field of behavioral ________, the study of how natural selection shapes behavior.
A. symptomatology
B. genetics
C. demographics
D. ecology
Answer: D
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Molecular fossils have fallen under scrutiny by some paleobotanists that are skeptical of the conclusions being drawn from their analysis. Why do they consider molecular fossils to be problematic?
a. There is no risk of contaminating the DNA materials during handling and isolation. b. It is considered useless for identifying plant by-products from the past because they bear no resemblance to modern counterparts. c. The chemical materials of interest degrade rapidly when exposed to air during isolation and handling. d. They feel we do not have the mastery of the technology tools needed to process this sort of data yet.
Why are food chains limited to a small number of links?
What will be an ideal response?
The ability to extend a leg is the result of
a. contraction of ligaments and tendons. b. contraction of a muscle. c. lengthening of a muscle. d. a combination of push and pull by antagonistic muscle pairs. e. relaxation of myosin and actin proteins.
Myofibrials are what?
What will be an ideal response?