Abiotic factors are ________.
A. living and nonliving components of an ecosystem
B. living components of an ecosystem
C. nonliving components of an ecosystem
D. None of the above
Answer: C
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In the disease myasthenia gravis, there is a deficiency of acetylcholine receptors at the neuromuscular junction. This shortage blocks contraction by preventing
A. generation of action potentials in the motor neuron. B. opening of the T-tubule system. C. release of Ca2+ from the sarcoplasmic reticulum. D. the interaction of troponin with tropomyosin. E. generation of action potentials in the muscle fiber.
What dangerous fungus has been recently found in soft coral tissues?
a. Aspergillosis b. Penecillium c. Yeast d. Bracket fungi
The enzyme responsible for breaking down
alcohol is a. alcohol methylase. b. alcohol polyphosphorylase. c. hydroxyl alcoholgenase. d. transmethylogenase. e. alcohol dehydrogenase
Good nutrition means that an individual's diet provides all the nutrients needed to promote growth and repair body tissues.
a. true b. false