Which eon would contain rocks with no fossils?
A. Proterozoic
B. Hadean
C. Phanerozoic
D. Archean
Answer: B
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DNA probes
A. may be obtained from denatured tagged dsDNA. B. may be obtained from similar genes from another organism. C. may be synthesized usually using information based on the protein sequence. D. are usually tagged dsRNA. E. may be obtained from denatured tagged dsDNA, may be obtained from similar genes from another organism, AND may be synthesized usually using information based on the protein sequence.
What are the problems with cloning as a conservation strategy? Check all that apply.
_____ It often requires finding appropriate surrogate mothers. _____ Populations of cloned individuals grow too quickly. _____ It requires detailed knowledge of species' reproductive biology. _____ It increases genetic diversity of a species beyond natural levels. _____ The root causes of species loss are not addressed by cloning methods.
Which of the following mutations always
lead(s) to a shift of the mRNA's reading frame?
a. deletion and insertion b. deletion and substitution c. insertion and substitution d. substitution e. insertion
Gregor Mendel ____
a. discovered the structure of DNA b. claimed that each individual carries a pair of "factors" for a given trait c. demonstrated that traits carried by parents are “blended” in their offspring d. cross-bred thirty different species of pea plants over a span of fifty years e. reasoned that each parent carries one gene for a specific trait