Amino acids are metabolized by reactions in which the amino group (2nh2) is first removed ___________
Fill in the blank(s) with the appropriate word(s).
Ans: deamination
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A. There's no oxygen present, and it cannot respire anaerobically. B. It lacks the ability to respire (i.e. no electron transport chain). C. There is no oxygen present and it cannot use anaerobic respiration OR it lacks the ability to respire (i.e., no electron transport chain). D. None of the above.
Nauplius, a unique kind of larva, is characteristic of
A. mites. B. crustaceans. C. horseshoe crabs. D. insects. E. chelicerates.
Jawless fishes were the first vertebrates to leave fossil evidence during the _____ period.
A. Cambrian B. Devonian C. Carboniferous D. Silurian E. Ordovician
Which of the following statements about soil is false?
A. the O and A horizon has the greatest physical, chemical, and biological activity B. the A horizon is the topsoil C. the B horizon is the subsoil D. the R horizon is bedrock or parent material E. none of the above are false