Which of the following organisms their genomic or genetic material may be either DNA or RNA only?
A. Prions
B. Viruses
C. Eukaryotes
D. Prokaryotes
E. The Correct answer is not listed
Ans: B. Viruses
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In eukaryotes that lack mitochondria, what structures take over their function to generate ATP?
A. There are no eukaryotes that lack mitochondria. B. There are no structures that generate ATP in eukaryotes that lack mitochondria. C. hydrogenosomes D. chloroplasts E. None of these answer options is correct.
Which of the following types of selection favors one extreme of a phenotypic distribution?
A. Disruptive selection B. Stabilizing selection C. Directional selection
Members of the ____ phylum have bilaterally symmetrical larvae, but exhibit secondary radial symmetry as adults,
usually organized around five rays, or "arms."
a. Hemichordata b. Echinodermata c. Cnidaria d. Arthropoda e. Chordata
The degree of earlobe attachment in humans is inherited as a simple dominant of free earlobes, or as a recessive allele of attached earlobes. What is the probability that a woman with attached earlobes will have children with attached earlobes if their father has free earlobes, but his father had attached earlobes?
A. 1 in 10 B. 3 in 4 C. 1 in 2 D. none