Her immune system's recognition of the second infection involves memory _____
A) helper T cells
B) natural killer cells
C) plasma cells
D) cytotoxic T cells
D
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Some traits evolve for one particular function, but then become co-opted for another function. For example, it is hypothesized that bird feathers originally evolved for thermoregulation/insulation, but then later became adapted for flight
In the text it is suggested that evolution of group hunting resulted in a brain that is able to play the piano or solve calculus problems. Please support or refute this statement. What will be an ideal response?
According to the theory of evolution, those best adapted to the environment will _____
a. survive and reproduce b. not survive c. produce offspring that are genetically identical to the parents d. have lower fertility rates e. have fewer offspring on average
An aquifer is most closely related to
a. sea water. b. lake water. c. stream water. d. glacial water. e. groundwater
Which of the following does NOT have much potential energy?
A) A diver on a springboard B) A glucose molecule C) A ball that has rolled downhill and stopped D) A 9-volt battery E) A water droplet at the top of a waterfall