A single atom of carbon may form up to ____ covalent bonds with other atoms.
A. two
B. three
C. four
D. five
E. six
Answer: C
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Experiments are carried out to test a hypothesis by changing one variable at a time and including an unchanged variable termed a(n) _____.
A. experimental variable B. altered variable C. control D. stable variable
Today, the use of deep sea submersibles like ________ allows marine scientists to collect samples and observe the deepest habitats in the ocean
a. Sea Explorer b. Alvin c. Calvin d. Alistair
Each of the following citric acid cycle enzymes catalyzes electron transfer to NADH/FADH2 except
A) isocitrate dehydrogenase. B) ?-ketoglutarate dehydrogenase. C) succinyl CoA synthetase. D) succinate dehydrogenase. E) malate dehydrogenase.
All male honeybees develop from unfertilized eggs. This is an example of
A) parthenogenesis. B) sexual reproduction. C) budding. D) hermaphrodism. E) external fertilization.