The average birth weight for human babies is about 3 kg. Which of the following terms best describes this?
A) artificial selection
B) directional selection
C) stabilizing selection
D) disruptive selection
E) sexual selection
Ans: C) stabilizing selection
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Which of the following is not a reason why gene regulation in prokaryotes is simpler than in eukaryotes?
A. Prokaryotic DNA is not packaged in chromosomes. B. Prokaryotic DNA is not sequestered in the nucleus. C. Processing of mRNA does not occur in prokaryotes. D. Prokaryotic mRNA travels rapidly from the nucleus. E. Transcription and translation are not separate processes in prokaryotes.
Which of the following is not associated with the thylakoid membranes?
a. photosystems I and II b. the Calvin cycle c. electron transport chain d. ATP synthase e. antenna complex
The exchange of gases between an organism and its environment is known as:
a. exhalation. b. aeration. c. inhalation. d. respiration. e. ventilation
Match each type of cell division with the correct description.