A nucleotide may contain a(n)
a. base.
b. 5-carbon sugar.
c. phosphate group.
d. adenine.
e. all of these
E
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Lions in east African safari parks learn to ignore the presence of safari vehicles. This form is learning is
A. compensatory. B. operant. C. cognitive. D. sign stimulus. E. habituation.
Answer the following statements true (T) or false (F)
1. Parasitic relationships tend to be highly intimate. 2. Character displacement is driven by competition. 3. Resource partitioning occurs between allopatric species. 4. Herbivory by rabbits on grasses benefits the grasses. 5. Species may NOT coexist if they occupy identical realized niches.
The functional group that characterizes an alcohol is
A. -NH2 B. -COOH C. -PO4 D. -SH E. -OH
Substrate activation may involve
A) a change in enzyme conformation induced by substrate binding. B) accepting protons from the enzyme. C) formation of temporary covalent bonds. D) donation of protons to the enzyme. E) All of these are correct.