Choose the incorrect statement regarding adaptation from the following:
A) Some observed traits may not be adaptive, but are simply due to the process of genetic drift.
B) Although adaptations may seem to exist for obvious reasons, their presence always needs to be tested.
C) All traits that are observed are not necessarily adaptive.
D) If a trait is adaptive, it will perfectly fit a need that confers an evolutionary advantage.
E) At the molecular level, many of the variations among individuals, populations, and species may be selectively neutral.
D
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A. liver. B. pancreas. C. hypothalamus. D. urinary bladder. E. kidney.
Which process occurs when a grapevine wraps around a trellis or another supporting structure?
A) photoperiodism B) thigmotropism C) gravitropism D) phototropism
What is the role of a countercurrent exchange?
a. It allows for an efficient exchange. b. It reduces a concentration gradient. c. It allows ventilation to occur more rapidly. d. all of these
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Indicate whether the statement is true or false