Which of the following is an example of direct water usage?
A) agricultural irrigation B) power plant cooling
C) steam generation D) home drinking water
Answer: D
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Van der Waals interactions may result when _____
A) hybrid orbitals overlap B) electrons are not symmetrically distributed in a molecule C) molecules held by ionic bonds react with water D) two polar covalent bonds react E) a hydrogen atom loses an electron
The unknown bacterium that you are testing makes the enzyme phenyalanine deaminase, as indicated by the results of a phenylalanine test. This enzyme facilitates the removal of a/an ______ group from the organic compound so it can be converted into an intermediate compound for the Krebs cycle.
A. phosphate B. carboxyl C. amino D. hydroxyl
A population grows exponentially when
A) the death rate equals the birth rate and immigration is equal to emigration. B) the carrying capacity is exceeded. C) emigration exceeds immigration and the birth rate equals the death rate. D) the birth rate and the death rate are equal. E) the birth rate exceeds the death rate and immigration exceeds emigration.
All veins carry oxygen-poor blood.
Answer the following statement true (T) or false (F)