What situation causes stress to reefs?
a. a parasitic relationship with dinoflagellates
b. clear waters in which all nutrients have settled
c. decline in fishing operations
d. lowering of sea level due to climate changes
e. pollutants released in coastal waters
ANSWER: e
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The terms phototroph and chemotroph refer to an organism's source of
A. carbon. B. nitrogen. C. energy. D. electrons.
All of the following are directly involved in translation EXCEPT
A) tRNA. B) amino acids. C) DNA. D) ribosomes. E) mRNA.
What does each different band on a DNA profile represent?
A polypeptide in a wild type microbe contains the sequence Leu-Pro-Tyr-Ser-Pro. A phenotypic variant of the species has the peptide sequence Leu-Pro-Cys-Ser-Pro. This is an example of a(n) ________ mutation.
A. nonsense B. missense C. silent D. frameshift E. inversion