Refer to Figure 33-1. The labeled structure that is responsible for secondary growth is:
a. 1.
b. 2.
c. 3.
d. 4.
e. 5.
D
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Which one of the following statements is true of the 32 allele in the CCR5 gene? (Choose all that apply)
A. It codes for a mutant protein that is completely inactive. B. It leads to a deletion which maintains the reading frame. C. It provides some protection against HIV progression to AIDS in both its heterozygous and homozygous forms. D. It is an example of a beneficial mutation. E. It affects the attachment of HIV to an animal cell by altering one of the viral proteins.
How does the male gametophyte travel to the female gametophyte of the conifers?
a. insects b. self-pollination c. birds d. wind
Breathing rates are automatically increased when _____ levels are _____
a. oxygen; high b. carbon dioxide; high
c. oxygen; low d. carbon dioxide; low e. ATP; low
In the typical ATP-ADP cycle, which part of the ATP molecule is removed when energy is released and added back when energy is stored?
A) the terminal two phosphate groups B) adenine C) the terminal phosphate group D) ribose E) all three phosphate groups