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

Biology & Microbiology

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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.

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What dangerous fungus has been recently found in soft coral tissues?

a. Aspergillosis b. Penecillium c. Yeast d. Bracket fungi

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The enzyme responsible for breaking down

alcohol is a. alcohol methylase. b. alcohol polyphosphorylase. c. hydroxyl alcoholgenase. d. transmethylogenase. e. alcohol dehydrogenase

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Good nutrition means that an individual's diet provides all the nutrients needed to promote growth and repair body tissues.

a. true b. false

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