met refers to a gene that governs a cells ability to synthesize methionine from inorganic precursors
The designation met- indicates:
a. that the allele is normal.
b. that the allele is the mutant allele.
c. that the bacterium is biologically active.
d. that the bacterium is biologically inactive.
e. that the bacterium can make its own methionine.
B
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A researcher has a laboratory strain of flies that have loss-of-function mutations in both gene X and white. These flies are used as hosts for P element transformation: Embryos of the double mutant strain are injected with two plasmids, one containing a wild-type copy of the white gene (w+) and a wild-type copy of gene X, side-by-side within P element inverted repeats, and the other plasmid containing only the P element transposase gene. Transgenic offspring of the injected flies will
A) have both plasmids integrated randomly into the genome. B) have white eyes and express transposase. C) have red eyes and a wild-type copy of gene X integrated into a random location in the genome. D) have red eyes and a wild-type copy of gene X in place of the mutant copy in their genome.
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Urbanization typically increases the extent of biodiversity
Indicate whether the statement is true or false