Most of the ATP used by a muscle during prolonged, moderate activity is produced by ____
a. creatine phosphate
b. lactate fermentation
c. aerobic respiration
d. glucose
e. pyruvate
c
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Replica plating
A. is useful for direct selection. B. is useful for identifying auxotrophs. C. uses media on which the mutant will not grow and the parental cell typewill. D. is used to store strains of bacteria. E. is useful for identifying auxotrophs AND uses media on which the mutant will not grow and the parental cell typewill.
Which of the following foods are highest in naturally occurring sugars?
Which type of plant hormone causes chloroplasts to mature?
a. cytokinins b. salicylic acid c. abscisic acid d. ethylene e. gibberellins
Clues from geology and paleontology suggest that simple cells, or their precursors, arose about _____ years ago.
A. 6 million B. 4 billion C. 2 billion D. 1 million E. 3 million