Organisms belonging to the Bacteria branch of the Tree of Life can demonstrate which of the following processes? (Select all correct choices.)
A. anoxygenic photosynthesis
B. oxygenic photosynthesis
C. anaerobic respiration
D. aerobic respiration
E. fermentation
A,B,C,D,E
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In nature, the predominant form of DNA is supercoiled in a negative direction
Indicate whether the statement is true or false.
What is the difference between the allosteric and torpedo models of eukaryotic transcritponal termination?
A. The allosteric model is that RNA pol II becomes destabilized after transcription of the poly A signal sequence while the torpedo model is that the polymerase is physically removed from the DNA B. The torpedo model is that RNA pol II becomes destabilized after transcription of the poly A signal sequence while the allosteric model is that the polymerase is physically removed from the DNA C. The allosteric model is that RNA pol II becomes destabilized after transcription of the stop codon sequence while the torpedo model is that the polymerase is physically removed from the DNA D. The torpedo model is that RNA pol II becomes destabilized after transcription of the stop codon while the allosteric model is that the polymerase is physically removed from the DNA E. The only difference between the two models is the proteins that are involved in removing the RNA pol II from the DNA
When measuring the age of a fossil using
Carbon dating, what is the oldest age that a fossil can be?
a. 2.2 million years old b. 200,000 years old c. 85,000 years old d. 72,000 years old e. 60,000 years old
Competition shapes communities because there are usually limited
A. species. B. resources. C. interactions. D. nutrients.