Which of the following statements about the DNA in one of your brain cells is true?
A) Most of the DNA codes for protein.
B) All of the genes of the genome are likely to be transcribed.
C) Each gene lies immediately adjacent to an enhancer.
D) Many genes are grouped into operon-like clusters.
E) It is the same as the DNA in one of your heart cells.
Answer: E
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The evolution of horses is best characterized as
a. a linear sequence of intermediate forms leading to modern horses. b. an example of evolutionary convergence. c. poorly documented and speculative. d. a gradual increase in body size. e. a complex branched history with many extinct lineages.
The parasitic sac fungus that grows on rye and other grains and contains the hallucinogenic chemical lysergic acid is
A. Rhizopus. B. Saccharomyces. C. Aspergillus. D. Penicillin. E. ergot.
Increasing population density on marginal lands in rural areas has resulted in desertification, which reduces the ability of the land to sustain the population
Indicate whether the statement is true or false
A corn kernel is classified as a seed.
a. true b. false