Plasmids
A. are found in all bacteria.
B. are essential for survival.
C. cannot be passed between organisms.
D. cannot be passed on to progeny.
E. are often the site of pathogenic genes.
Answer: E. are often the site of pathogenic genes.
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In 1970 Stanier proposed that classification be based on
A. evolution. B. Gram stain. C. physiology. D. DNA sequence.
Describe the modern techniques for studying marine biology and the dissemination of information about marine biology
What will be an ideal response?
Given the plant species' name Claytonia virginica, what might you surmise about it?
a. It was named in honor of somebody named Clayton and was found it in Virginia. b. It grows on clay soils in virgin forests. c. It was described and named by someone named Clayton d. It is related to Ostrya virginiana. e. Absolutely nothing.
All of the following are useful indicators of evolutionary relationships EXCEPT
a. base sequences in DNA. b. amino acid sequences in a protein. c. similar ecological requirements. d. similar embryonic development. e. similar polypeptides