Evolution of the eyes into a forward-directed position allowed for better
a. detection of shapes in three dimensions.
b. detection of movements in three dimensions.
c. response to variations in color.
d. response to variations in light intensity.
e. all of these.
E
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The combination of freezing and drying is known as:
A) desiccation. B) lyophilization. C) pasteurization. D) tyndallization.
Multiple sclerosis is an autoimmune disease in which the immune system attacks and destroys ____, resulting in ____
a. dendrites; activation of acetylcholine b. axon terminals; euphoria c. receptors for neurotransmitters; the blocking of neurotransmitter reuptake d. myelin sheaths; impaired coordination e. cell body membranes; memory loss
Iron-response elements are part of the untranslated regions of mRNA and regulate gene expression through ________ control
Fill in the blank with correct word.
Usually, a virus infects a cell and arrests the normal synthetic activities of the host, redirecting the cell to use its available materials to manufacture viral nucleic acids and proteins, which assemble into new viruses. Ultimately, the infected cell ruptures and releases a new generation of viral particles that can infect neighboring cells. This type of infection is called a(n) _________ infection.
A) eluctable B) lytic C) avirulent D) proviral E) virulent