How do radioactive isotopes differ from isotopes?
A) Radioactive isotopes have more neutrons than do isotopes.
B) Radioactive isotopes are stable; isotopes are unstable.
C) Radioactive isotopes have fewer neutrons than do isotopes.
D) Radioactive isotopes are unstable; isotopes are stable.
Answer: D) Radioactive isotopes are unstable; isotopes are stable.
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Fatty acid analysis
A. can be used to identify Gram-negative bacteria. B. can be used to identify Gram-positive bacteria. C. uses gas chromatography to analyze fatty acid methyl esters. D. requires that cells be grown under standardized conditions. E. All of these choices are correct.
The extracellular matrix is composed mostly of
1.glycoproteins. 2.DNA. 3.RNA. 4.ribosomes. 5.lipids.
Opening
What will be an ideal response?
Which classification level contains the greatest number of species?
a. class b. order c. family d. domain e. phylum