Which step of the nitrogen cycle is not performed by most bacteria?
a. ammonification
b. denitrification
c. assimilation
d. nitrogen fixation
e. nitrification
c
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Which of the following misconceptions about evolution can be refuted with the molecular evidence that is being collected through DNA analysis?
A. Evolution is not observable or testable, thus it is not science. B. Evolution proposes life changed as a result of random events; traits are too complex to have originated by chance alone. C. Evolution is a theory about how life originated. D. There are no transitional fossils.
You take a deep breath and then exhale forcibly. The amount of air left in your lungs is the ____
a. residual volume b. respiratory rate c. vital capacity d. tidal volume e. inspiratory reserve volume
The island water snake is one of several subspecies within the species that includes the common water snake. The island water snake has the same relationship to the common water snake as
A. two different breeds of dog (collie and St. Bernard). B. a jellyfish to a goldfish. C. a cat to a wolf. D. a poisonous snake to a nonpoisonous snake.
What does MALDI stand for?
A) Matrix-Assisted Laser Desorption Ionization B) Maser-Assisted Ligand Desorption Ionization C) Maser-Assisted Laser Desorption Ionization D) Matrix-Assisted Ligand Desorption Ionization