Cell differentiation _____
a. occurs in all complex multicelled organisms
b. requires unique genes in different cells
c. involves selective gene expression
d. occurs in all complex multicelled organisms and involves selective gene expression
e. all of these
D
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The maximum volume of air that moves in and out of the lungs with forced inhalation and exhalation is the ____
a. vital capacity b. tidal volume c. forced inhalation volume d. forced exhalation volume e. residual volume
Which is the correct plural form of the word for the organisms studied in this exercise?
a. alga. b. algae. c. algas. d. algaes.
The secondary response to an antigen is more rapid and robust than the primary response.
Answer the following statement true (T) or false (F)
In the nematode C. elegans, ced-9 prevents apoptosis in a normal cell in which of the following ways?
A) It prevents the caspase activity of ced-3 and ced-4. B) Ced-9 remains inactive until it is signaled by ced-3 and other caspases. C) Ced-9 cleaves to produce ced-3 and ced-4. D) Ced-9 prevents blebbing by its action on the cell membrane.