Which of the following is NOT an example of a good or service provided by plants that directly benefits human society?
A. discovery of new medicines
B. horticultural therapy and stress relief
C. dietary source of vitamins, minerals, and fiber
D. source of oxygen and sink for carbon dioxide
E. All of the above are benefits plants provide to human society.
Ans: E. All of the above are benefits plants provide to human society.
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Which of the following statements explains how N-formylmethionine (fMet) is incorporated only in response to the 5'-AUG initiation codon in E. coli, given that methionine has only one codon?
A. There is only one tRNA with the CAU anticodon. B. Only Met-tRNAmet can bind to a specific ribosomal entry site. C. The N-formyl group on methionine prevents fMet from entering interior positions in a polypeptide. D. fMet is always incorporated at interior AUG sites and then deformylated after translation.
Members of which of the following groups can
be single-celled producers?
a. plantae b. protista c. bacteria d. bacteria and protista e. bacteria and plantae
Predation is similar to ________ in that both types of relationship benefit one of the interacting species while harming the other
A) competition B) parasitism C) coevolution D) symbiosis E) mutualism
A person who has blurred vision caused by a misshapen lens or cornea has
A) myopia. B) astigmatism. C) presbyopia. D) hyperopia.