The occurrence of an RNA world early in the history of life can never be proven, but experiments with _____ have
shown that it is feasible.
a. in vitro evolution
b. Darwin’s evolution
c. indirected evolution
d. chemical evolution
e. biological evolution
a
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A pathogenic bacterial species has mutated and is no longer able to synthesize a capsule. Which outcome would you predict?
A. The mutated bacteria will be protected from plasmolysis in hypertonic environments. B. The mutated bacteria will not be able to cause disease as readily. C. The mutated bacteria will undergo osmotic lysis in hypotonic environments. D. The mutated bacteria will be more virulent.
What are the types of gametes that can be produced by an individual with the genotype AaBb?
a) Aa, Bb b) AA, aa, BB, bb c) AB, Ab, aB, ab d) AB, ab
Acridines are mutagens that cause:
a. insertion mutations which result in frameshifts that are always lethal b. deletion mutations which result in frameshift mutations that are always lethal c. insertion mutations which result in frameshifts that can be lethal d. deletion mutations which result in frameshift mutations that can be lethal e. Both c and d
What types of DNA damage will trigger DNA repair?
What will be an ideal response?