Which digestive structure in humans is active in both the digestion of food and the absorption of
nutrients?
a. mouth
b. liver
c. pancreas
d. small intestine
e. stomach
D
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Potassium ions are at high concentrations inside of cells including in neurons.
a. true b. false
The position of mammals in evolution is best described as
A. they dominate life in the sea. B. they arose from mammal-like reptiles in the Jurassic but remained small and insignificant while dinosaurs dominated the land. C. mammals gave rise to birds. D. they were among the first animals to live on land and their diversity is greater than all living things known. E. All of the choices are correct.
When comparing energy and chemicals in an ecosystem,
What will be an ideal response?
The virulence of Vibrio cholerae is due to its
A. enterotoxin. B. invasive enzymes. C. neurotoxin. D. capsule. E. All of the above.