Most eukaryotic genes contain noncoding sequences called ________ that are interspersed with the coding sequences.
A. introns
B. exons
C. spacers
D. spliceosomes
E. codons
Answer: A
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We currently know:
A. all of the genetic risk factors for most cancers and many common diseases. B. many genetic risk factors for some cancers and common diseases. C. the individual mutations that cause colon cancer, breast cancer, and Alzheimer's disease. D. the individual mutations that cause breast cancer, lung cancer, and inflammatory bowel disease. E. the combination of genetic risk factors that cause skin cancer, lung cancer, and colon cancer.
If blending inheritance was an accurate model of transmission genetics, which of the following would be true?
A. Variation in natural populations would remain the same over time. B. Variation in natural populations would increase over time. C. Variation in natural populations would decrease over time. D. Variation would increase in some populations, decrease in some populations, and remain the same in some populations. E. Mutation would not contribute to variation in natural populations.
K. denitrificans, which is nonhemolytic and tends to pit the agar, also grows on selective media that support the growth of which gram-negative diplococci?
a. Capnocytophaga spp. b. C. hominis c. A. aphrophilus d. N. gonorrhoeae
A shared ancestral characteristic used in cladistics is found
A. only in the most distant ancestor. B. in both the outgroup and the ingroup. C. in two of the outgroups. D. only among the members of the ingroup. E. only in the two most recent ancestors.