What are leaves specialized to do?
a. provide structural support
b. intercept sunlight for photosynthesis
c. absorb water
d. absorb minerals
e. distribute water and minerals
ANSWER: b
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Which plant group is notable for the independence of gametophyte and sporophyte generations from each other?
A) ferns B) bryophytes C) charophytes D) angiosperms E) gymnosperms
Antibody titer can be measured by
A) negative microscopy. B) agglutination. C) plate counts done after isolating the pathogen. D) polymerase chain reaction.
What is another name for the polymers of carbohydrates?
A) Triglycerides B) Polysaccharides C) Polypeptides D) Nucleotides
Potassium ions are important in the resting membrane potential and the action potential of the nerve and to the contraction of muscle cells. The concentration gradient of potassium ions is critical to both. An excess of potassium outside a neuron or
muscle cell would negate the concentration gradient. What would happen if the heart were injected with massive amounts of potassium? Explain your answer. What will be an ideal response?