In ascomycetes, the ascus functions in
A) asexual reproduction.
B) vegetative growth.
C) sexual reproduction.
D) photosynthesis.
E) digestion.
C
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Which of the following has a complex sort of sexual
reproduction called conjugation? a. ciliates b. Plasmodium c. trypanosomes d. slime molds e. euglenoids
What ratios of these three tetrads would you expect to see if two genes are linked? Why is each type of tetrad more or less common? What ratios would you expect to see if the two genes are unlinked? Why?
What will be an ideal response?
Messenger RNAs containing premature stop codons are destroyed by the mechanism of
A) nonstop decay. B) directed RNase activity. C) nonsense-mediated decay. D) error-mediated repair. E) None of these mechanisms.
A field of wildflowers contains approximately equal numbers of red, yellow, and white flowers. A fire moves through the field and kills most of the red and yellow flowers, but leaves a small population of white flowers undisturbed. The following year, most of the flowers that grow in the field are white. Which process has resulted in the random change in the genetic makeup of the flower population?
A) gene flow B) stabilizing selection C) genetic drift D) directional selection