A ______________ group consists of the most recent common ancestor and some of its descendants.
Fill in the blank(s) with the appropriate word(s).
paraphyletic
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Which of the following statements about transformation is false?
A. The bacterium E. coli is incapable of natural transformation. B. Like transduction and conjugation, natural transformation is an "accident" of plasmid biology. C. Artificial transformation is essential to many recombinant DNA techniques. D. All R-plasmids contain antibiotic-resistance genes. E. Natural transformation of the Enterobacteriaceae is a significant public health risk.
You wish to confirm that gene X is associated with the F plasmid of your bacterial strain. To accomplish this using bacterial conjugation, you should conjugate your strain with a compatible bacterial strain that is
A) an Hfr strain. B) another F+ strain. C) an F' strain. D) an F? strain. E) the same F+ strain.
You discover a new mutation in Drosophila that causes an abnormal wing shape. When a male fly with this mutation is crossed to a homozygous normal female, the F1 are all wild-type phenotypically. The F2 flies consist of 1/2 phenotypically normal females, 1/4 phenotypically normal males, and 1/4 males with abnormal wings. What is the MOST likely explanation for the new mutant allele?
A. It is Y linked. B. It is X linked and recessive. C. It is X linked and dominant. D. It is autosomal and recessive. E. It is autosomal and dominant.
One essential element that has two different cycles is
A. water B. carbon C. nitrogen D. phosphorus