The sides of the DNA ladder (backbone) are
A. the R groups.
B. alternating carbons and nitrogens.
C. the nitrogenous bases.
D. alternating nitrogens and phosphates.
E. sugars and phosphates.
Answer: E
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Suppose you discover a mutant plant that cannot actively transport solutes across the tonoplast. Which
of the following should you expect?
a. The plant will wilt easily. b. The plant will generally be like a normal plant. c. The plant will not have leaves. d. The plant will not have roots. e. The plant cells will not be able to divide.
A house plant that has been placed in the window will grow toward the source of light because auxin ____
a. becomes more concentrated on the illuminated side of the plant b. becomes less concentrated on the illuminated side of the plant c. becomes more concentrated in the roots of the plant d. inhibits the growth of cells on the shady side, so the cells on the sunny side grow faster e. is produced only when the sun shines
Photosynthetic parenchyma is called ____________________. Fill in the blank(s) with the appropriate word(s)
Select all of the examples of cytokines, the signaling molecules produced by T lymphocytes, macrophages, and other cells.