A behavior that benefits others at a cost to oneself is known as
A. group selection.
B. cognition.
C. cooperation.
D. altruism.
E. aggression.
Answer: D
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Which of the following statements best describes the Hox genes of the different groups of animals?
A. All animals have Hox genes. B. Invertebrate chordates have one cluster of Hox genes. C. Gnathostomes have four clusters of Hox genes. D. Hox genes are involved with the evolution of structural complexity. E. All the choices provided are correct.
Taxol is used to treat what type of cancer?
A. leukemia B. testicular cancer C. ovarian cancer D. lymphoma E. colon cancer
The following steps occur during multiplication of retroviruses. Which is the fourth step?
A) synthesis of double-stranded DNA B) synthesis of +RNA C) attachment D) penetration E) uncoating
Which of the following statements regarding transcription is FALSE?
a. Transcription starts at the DNA template corresponding to the 5? end of the mRNA. b. Transcription starts at the DNA template corresponding to the 3? end of the mRNA. c. Transcription starts at the 3? end of the template DNA. d. Transcription happens in the 3? to 5? direction of the template DNA e. Transcription occurs in the 5? to 3? direction of the RNA.