The earth’s earliest atmosphere was likely composed
mostly of gaseous
a. hydrogen.
b. nitrogen.
c. water vapor.
d. carbon dioxide.
e. mixtures of these.
Answer: e
You might also like to view...
During meiosis in an organism where 2n = 8, how many chromatids will be present in a cell at the beginning of meiosis II?
a. 2 b. 4 c. 6 d. 8 e. 12
The bacteria associated with hemolytic uremic syndrome is
A. Salmonella cholerasuis. B. Campylobacter jejuni. C. Pseudomonas aeruginosa. D. Lactobacillus. E. Escherichia coli O157:H7.
Megakaryocytes fragment to produce
a. red blood cells. b. lymphocytes. c. platelets. d. eosinophils. e. neutrophils.
You are studying an enzyme-catalyzed reaction that induces a particular cellular activity in the lab. If you wanted to slow down that particular cellular activity by controlling the enzyme, what could you do?
A. Decrease the temperature of the incubator where the cells are growing B. Add an allosteric activator to the cells C. Add cofactors to the media the cells are growing in D. Increase the pH of the media the cells are growing in to the optimum pH