Which statement best describes primary growth in angiosperms?
A) First-year growth occurs at the tips of shoots and roots, and then growth occurs evenly throughout the plant as it ages.
B) Growth occurs at the tips of shoots and roots.
C) First-year growth occurs evenly throughout the plant, and then growth only occurs at the tips and shoots as it ages.
D) Growth occurs evenly throughout the plant.
Answer: B
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How does a signal molecule bring about specific changes in the cell to which it binds?
What will be an ideal response?
The two steps of transcription followed by
translation a. explain the structural complexity of genes. b. describe the flow of genetic information. c. are based upon the role of proteins in controlling life. d. do not explain how genes function. e. explain evolution in terms of molecular biology.
The polar transport of auxin in a seedling
a. occurs in parenchyma cells. b. uses passive membrane transporters to move auxin in and out of cells. c. uses membrane pumps to move hydrogen ions out of the cytoplasm into the primary cell wall. d. activates enzymes that loosen cross-links between cellulose microfibrils. e. does all of these.
The best definition of population density is:
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