In a stratified lake, the warmer and less dense layer is called the
A) epilimnion.
B) hypolimnion.
C) hyperlimnion.
D) thermocline.
Answer: A
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The first hormone to be made by recombinant bacteria was ____
A. Insulin B. Glucagon C. Somatostatin D. Testosterone
In this reaction, acetaldehyde represents the
a. enzyme. b. substrate. c. product. d. activation energy. e. trigger.
The atom found in the greatest amount in the human body, the earth's crust, and seawater is
A. hydrogen. B. carbon. C. nitrogen. D. oxygen. E. phosphorus.
Prions are created when normal proteins in the body ____
a. combine with large ribosomal subunit and become infectious
b. exchange several long sections of amino acids with other infected proteins c. refold into a different and infectious three-dimensional shape that kills cells in the brain and nervous system d. undergo mutation and create hundreds of copies of themselves e. invade the immune system, causing it to mistakenly destroy the body’s healthy tissue