Which of these is the smallest structure?
A. Dipeptide
B. Protein
C. Polypeptide
D. Amino acid
Ans: D. Amino acid
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The competitive exclusion principle states that _____
A) it is not possible for two species with the same niche to coexist in the same region B) it is not possible for two species to compete for the same resources C) two species with different niches will not compete for the same resources D) two species with the same niche will constantly be competing for resources
Codons are part of the molecular structure of _____
A) a protein B) mRNA C) tRNA D) rRNA
Tapeworms are most commonly found in persons who
a. eat undercooked rice. b. walk barefoot in a rice field. c. eat undercooked pork. d. are bitten by mosquitoes. e. are bitten by ticks.
Predators often avoid a mimic species because of ____
a. bad taste b. toxic secretion c. resemblance to a well-defended species d. painful sting e. cryptic coloration