Your lunch is digested by enzymes in your gastrointestinal tract. These chemical reactions are best categorized as _______
A. anabolism
B. catabolism
C. chemiosmosis
D. diffusion
E. active transport
B. catabolism
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A human male diploid cell has which sex chromosome combination?
a. XX b. XY c. YY d. X e. Y
During the formation of gametes for sexual reproduction, DNA is exchanged among the chromosomes, which varies the genetic information passed to the offspring. What is this process called?
A) DNA replication B) translation C) transcription D) crossing over
If a lung is punctured in a car accident, that lobe fails to inflate even though there is no obstruction of the air passageway to that lobe. Why?
Select one: a. The trauma must have damaged the nerve path controlling ribs on that side of the lung. b. Negative feedback prevents the ribs and diaphragm on that side from causing pain. c. When the chest volume expands, air can now rush in through the puncture without filling the alveoli. d. Mucus or blood must be filling the lobe. e. Stimulation of stretch receptors in the alveolar walls initiate inhibitory nerve impulses.
Lampreys differ from fishes in that lampreys
A) lack a backbone. B) lack an endoskeleton. C) lack jaws. D) possess a backbone and skull.