The genetic material within a virus is in the form of:
A) the genetic material within a virus may be any of these
B) single-stranded DNA
C) double-stranded RNA
D) single stranded RNA
E) double-stranded DNA
Answer: A) the genetic material within a virus may be any of these
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When Darwin observed several species of finches on the Galápagos Islands had unique beak characteristics, he compared them with finch beaks on the mainland. Which of the following studies use geographic distribution of extinct and living species to determine patterns of evolution?
A. Biology. B. Geology. C. Palentology. D. Geneology. E. Biogeography.
In your Drosophila laboratory, you find a larva that is missing segments Lb, T1, T2, and T3. This larva probably has a mutation in a ___________ gene.
A. pair-rule B. gap C. maternal effect D. segment-polarity E. gap or segment-polarity
Cardiac muscle cells are
a. involuntary. b. spindle-shaped. c. multinucleated. d. slow contracting. e. all of these
Nutrient-rich blood flows from the placenta to the fetus via the
a. ductus arteriosus. b. fossa ovalis. c. ductus venosus. d. foramen ovale. e. allantois.