The pancreatic secretions governing glucose levels are precisely controlled by
a. neural connections to the pancreas.
b. the blood-brain barrier.
c. cooperative interactions.
d. homeostatic feedback loops.
e. releasing factors.
D
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Classify the following as domains, kingdoms, or neither.
The niche of a lichen in an ecosystem is
a. a producer. b. a consumer. c. a detritivore. d. a decomposer. e. more than one of these
The inducer of the lactose operon in E. coli is:
a. CAP. b. AMP. c. allolactose. d. glucose. e. galactose.
What was the most significant conclusion of Griffith's experiments with pneumonia in mice?
A) S-strain bacteria can cause pneumonia. B) There is a substance present in dead bacteria that can cause a heritable change in living bacteria. C) Heat destroys the hereditary material. D) The genetic material was definitively proven to be DNA. E) Mice exposed to the S-strain bacterium became resistant to the R-strain bacterium.