Four of the five answers are correct statements about breathing. Select the exception
a. During inhalation, the chest cavity expands.
b. Inhalation is powered in part by the diaphragm.
c. Muscles in the walls of the lungs aid in enlarging the lung volume.
d. During exhalation, the diaphragm moves upward.
e. A respiratory cycle is one breath in (inhalation) and one breath out (exhalation).
c
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The situation in which an active regulatory protein "turns off" gene expression is an example of
A) a mutation. B) positive control. C) negative control. D) constitutive gene elements. E) unique regulation.
Halobacterium salinarum lives in and requires a high salt concentration. This is an example of an archaeon described as a ______.
A. halophile B. thermophile C. barophile D. psychrophile
A plaque is
A) a colony of bacteria growing on a plate. B) a clump of bacterial cells that contain phage within them. C) a region on a plate where bacteria that have survived phage infection are living. D) an area on a plate that has live phage-resistant bacteria. E) an area on a plate that has phage and dead bacteria.
A person who has just experienced a painful sunburn has a large number of cells undergoing mitosis for the purpose of
A. developing new stem cells that will give rise to new skin cells. B. repairing and replacing the damaged cells, in the healing process of the skin. C. replication of new DNA copies, so that meiosis will further grow new skin cells. D. modifying new cells that will have different specialties than the original damaged cells. E. asexual reproduction, to produce new skin buds that will fold over and cover the burn.