Chyme is first formed in the
a. mouth.
b. esophagus.
c. stomach.
d. small intestine.
e. large intestine.
C
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The process whereby microorganisms are used to help clean up pollution created by human activities is known as
A) bioaugmentation. B) biodegradation. C) bioengineering. D) bioremediation.
Which of the following is incorrectly paired?
a. nerve net—simple nervous system common in radially symmetrical animals b. CNS—consists of the spinal column and brain c. interneurons—portion of the peripheral nervous system that integrates signals d. spinal column—protects the spinal cord
Chemical messengers in the cell that control the amounts of enzyme produced is/are
A. DNA. B. gene regulator proteins. C. inhibitors. D. coenzymes.
Which class of RNA carries protein-building codes from DNA?
A) mRNA B) tRNA C) rRNA D) all of the choices