The tendency of water molecules to stick together is referred to as
A) adhesion.
B) polarity.
C) cohesion.
D) transpiration.
Answer: C
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The increased osmolarity of the filtrate after Bowman's capsule is caused by:
A. diffusion of NaCl out of the proximal tubule. B. diffusion of HCO3– out of the proximal tubule. C. active transport of NaCl out of the proximal tubule. D. active transport of HCO3– out of the proximal tubule.
All of the following represent anchoring junctions EXCEPT
A. tight junctions. B. focal adhesions. C. hemidesmosomes. D. desmosomes. E. adherens junctions.
If the GC content of a DNA molecule is 60 percent, what are the molar percentages of the four bases (G, C, T, A)?
What will be an ideal response?
Choose the best definition of a community.
A. all of the organisms plus the nonliving habitat B. the dominant organisms in an area C. all of the organisms in an area D. living organisms and soil