An organism that can exist in both oxygen and oxygen-free environments is a(n) ________.
A. facultative anaerobe
B. obligate anaerobe
C. microaerophile
D. obligate aerobe
E. aerobe
Answer: A
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Compare proteins to nucleic acids. Which of the following is true?
A) Both have primary and secondary structure. B) Both contain sulfur. C) Both take on structural roles in the cell. D) Both have monomers, which contain phosphorus.
In addition to the promise of disease therapies, the uses of stem cells in medical research include the study of how
_____. a. diseases develop and progress before phenotypes are visible b. Huntington Disease progresses in its latest stages c. to engineer animal models for human disease d. to harvest multipotent cells from human blastocysts e. to fertilize human eggs in vitro
Snakes are most closely related to:
a. lizards. b. turtles. c. eels. d. caecilians. e. synapsids.
What are the three eukaryotic nuclear DNA replicases and their functions?
What will be an ideal response?