A site of negative genetic regulation where binding by repressor blocks transcription is the
A. operon.
B. CAP.
C. promoter.
D. operator.
E. repressor.
Answer: D
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Water and nutrients that have been filtered from the glomerular filtrate are returned to circulation as they enter the
A) renal artery. B) vasa recta. C) efferent arteriole. D) peritubular capillaries. E) vasa recta and peritubular capillaries.
In general, the blastomeres of the _____ form the endodermal tissues.
A. membrane B. equator region C. vegetal pole D. animal pole
No one is certain what the function of the human appendix is. But, one thing we do know is that we can live without it, without noticeable consequences. Therefore, the human appendix is an example of a(n)
A) mutation. B) vestigial structure. C) analogous structure. D) homologous structure. E) adaptation.
Earth is generally hotter at the equator because:
A) the sun shines over the equator evenly through the year, rather than seasonally. B) Earth's rotation on a tilted axis creates an atmospheric drag at the equator, warming the air. C) the Earth receives the most direct sunlight over the course of the year at the equator. D) Earth's rotation on a tilted axis increases seasonality. E) the natural oval shape of Earth places the equator nearer the sun than the poles.