What creates the holes in bread?
A) Oxygen gas
B) Air
C) Alcohol
D) Yeast
E) Carbon dioxide
E
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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
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.
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)