After running a 100-meter race, Seth is breathing hard. What is his body doing by increasing his respiration rate after exercise?
A) building up lactic acid
B) increasing the number of NADH molecules
C) starting glycolysis
D) restocking oxygen
Ans: D) restocking oxygen
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The semipermeable structure controlling the transport of materials between the cell and its external environment is the:
A) cell membrane. B) cell wall. C) cytoplasm. D) nuclear membrane.
Systems in which feedback from changes in one direction elicit compensatory effects in the opposite direction.
What will be an ideal response?
Mitochondria are descendants of ________, and chloroplasts are descendants of ________.
A. orange bacteria; purple bacteria B. purple bacteria; cyanobacteria C. methanogens; protists D. cyanobacteria; fungi
All the genes on one chromosome are said to form a
a. chromosomal group. b. recombination group. c. linkage group. d. crossing-over group.