The conversion of nitrate (NO3-) to nitrogen gas (N2) is called ________.
A. ammonification
B. nitrogen fixation
C. photosynthesis
D. nitrification
E. denitrification
Answer: E
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A ___ is a chemical that is released by one animal that affects the physiology and or behavior of another member of the same species.
A) neurotransmitter B) neurochemical C) hormone D) pheromone
The apical bud of a shoot produces ________, resulting in the inhibition of lateral bud growth
A) abscisic acid B) ethylene C) cytokinin D) gibberellin E) auxin
Which of the following provides the best explanation for why viruses are not included in the three domain system?
A. Viruses have either DNA or RNA, not both. B. Viruses show no evidence of evolution. C. Viruses are not a cellular life form. D. Viruses are too small.
Taste cells that respond to umami specifically interact with ____
a. sodium ions b. hydrogen ions c. quinine d. sugars e. glutamate