The process by which soil bacteria convert NH3 or NH4 to nitrate (NO3-) is called
A. assimilation.
B. denitrification.
C. Decomposition.
D. nitrification.
E. ammonification.
D. nitrification.
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Symptoms of influenza include
A. fever and pneumonia. B. fever, sore throat, rash, and cough. C. fever, diarrhea, and vomiting. D. fever, myalgia, sore throat, cough, and nasal discharge. E. nasal discharge, mild fever, and absence of cough.
A salt is a compound in which the hydrogen ion of ____ is replaced by some other cation
a. water b. a base c. an acid d. an anion e. a hydroxide ion
You are building a phylogenetic tree to study the relationships between protists that live in termite guts. You find that the protists you're studying readily adapt to different environments through similar morphological means. Because of this, you're worried that any similarities between the protists are due to convergent evolution. What's the best kind of method to use to construct your tree?
A. parsimony B. bootstrapping C. maximum likelihood
In comparing a frog cell in metaphase of mitosis with one in metaphase I of meiosis, how would tell you which was which?
A) In mitosis, the chromosomes would be unduplicated (single-stranded) and in meiosis, they would be double-stranded (made up of sister chromatids). B) In meiosis, the chromosomes would be unduplicated (single-stranded) and in mitosis, they would be double-stranded (made up of sister chromatids). C) Unlike meiosis, in mitosis each chromosome would be paired with its homolog. D) Unlike mitosis, in meiosis each chromosome would be opposite its homolog.