Which statement about electrons is true?
a. Electrons reside outside of the nucleus and have a charge of -1.
b. Electrons reside inside of the nucleus and have a charge of +1.
c. Electrons have a mass of 1 and a charge of +1.
d. Electrons have a mass of 1 and a charge of -1.
a. Electrons reside outside of the nucleus and have a charge of -1.
Electrons reside outside of the nucleus and have a charge of -1.
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Quality control was performed to determine the validity of urea agar. S. multivorum and E. meningoseptica were used, which yielded positive for S. multivorum and negative for E. menin-goseptica. Which one of the following statements explains this discrepancy?
a. The urea agar is most likely expired. b. The pH is off on the urea agar. c. These two organisms are poor choices for quality control because they are both urea positive. d. No discrepancy is present; the results are valid.
These bacteria ferment sugars, produce lactate, and are used for some food production
a. Lactobacillus b. Bacillus c. spirochetes d. Agrobacterium e. cyanobacteria
Protists that are part of a(n) _____ are integrated with other cells, but remain self-sufficient
a. multicellular organism b. colonial organism c. contractile vacuole d. algal bloom e. pathogenic life cycle
It now appears that the monocots branched off from
the a. ginkgos. b. cycads. c. eudicots. d. conifers. e. gnetophytes.