Which of the following enzymes digests starch?
a. carboxypeptidase
b. amylase
c. trypsin
d. chymotrypsin
e. pepsin
b
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A rod-shaped bacteria is called:
a. coccus. b. auxospore. c. bacillus. d. bacteriophage. e. spirillus.
Before another action potential “spike” can occur
a. there must be a very brief restoration of the resting conditions in the membrane. b. the membrane voltage must drop to zero. c. the sodium-potassium pump must cease temporarily. d. all of the membrane gates must be closed at the same time. e. all of these must happen.
A biologist studying evolution starts with a single cell of E. coli and grows a population of one billion bacteria from it. Which rule of Hardy-Weinberg must be broken first before evolution will occur in this population?
a. no new mutations b. large population size c. no natural selection d. random mating
If a field contains approximately 1,000 kilocalories of energy in grass, which is eaten by crickets, which are eaten by birds, then approximately how many kilocalories of energy could be in the birds that live in this field?
A) 90 B) 1,000 C) 10 D) 100 E) 900