During the first step of nitrification, ammonium is converted into ________
a. water vapor
b. carbon dioxide
c. nitrite
d. nitrate
e. nitrogen gas
c
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Populations can be divided into three ecologically important age classes: prereproductive, reproductive, and ________
Fill in the blank(s) with correct word
Which of the following are likely detritivores?
a. earthworms b. deer c. grasshoppers d. spiders e. lions
Comparisons of human and mouse genomes reveals
A. they have very little in common. B. they have widely different numbers of genes, and share only a few more genes than humans and pufferfish. C. the genomes are very similar, with most of the genes unique to mice linked to size and shape. D. the genomes are very similar, with most of the genes unique to mice linked to smell and reproduction. E. the differences between humans and mice are mainly the introns.
A laboratory recipe lists sucrose, an ammonia compound, calcium salts and a buffer as the ingredients for a microbiologic medium. These are added to water and autoclaved. What type of medium does this protocol produce?
A. defined agar B. defined broth C. complex broth D. reducing agar E. complex enrichment broth