Which of the following is correctly matched with its description?
A. Highly repetitive DNA contains transposable elements and genes that are expressed in abundance and thus have many copies.
B. Moderately repetitive DNA contains unique sequences, such as genes found in one or a few copies.
C. Non-repetitive DNA is composed of thousands of copies of many short repeats.
D. Moderately repetitive DNA contains retro elements, such as the Alu sequence.
E. Moderately repetitive DNA contains transposable elements and genes that are expressed in abundance and thus have many copies
E
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Dissimilatory sulfide-oxidizers use a variety of unique ecological strategies in order to
A) avoid the toxicity of hydrogen sulfide. B) position themselves at interfaces where sulfide and oxygen meet. C) position themselves where there is sufficient light for sulfide oxidation. D) find organic carbon substrates.
Temperature-sensitive alleles are examples of _________
A. essential genes B. lethal alleles C. semilethal alleles D. nonessential genes E. conditional lethal alleles
Streptomyces produces geosmins which give soil a characteristic musty odor
Indicate whether this statement is TRUE or FALSE.
Phylogeny is a sub-discipline of
a. geology. b. taxonomy. c. biogeograpy. d. genetics. e. ecology.