What creates the holes in bread?
A) Oxygen gas
B) Air
C) Alcohol
D) Yeast
E) Carbon dioxide
E
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Each DNA strand serves as which of the
following during DNA synthesis?
a. a replicate b. a substitute c. a template d. a source of nucleotides e. all of these
Oxidation and reduction reactions are chemical processes that result in a gain or loss of
A. protons. B. atoms. C. molecules. D. neutrons. E. electrons.
During root nodule development rhizobia penetrate into root cortex cells. Next, proteins called __________ cause root cortex cells to divide, forming nodules.
A. Nod factors B. Flavonoids C. Nodulins D. Leghemoglobin E. Bacteroids
A mutation in a single gene always has only one discrete effect on an individual's phenotype.
Answer the following statement true (T) or false (F)