If one compares the base sequences of related genes from different species, one is likely to find that corresponding ________ are usually conserved, but the sequences of ________ are much less well conserved
A) exons; introns
B) chaperons; exons
C) introns; proteins
D) introns; chaperons
E) introns; exons
A
You might also like to view...
Compared to humans, koalas have a ______ level of physical activity, and food to fuel this activity spends a _______ time being digested in the gut
a. higher; shorter b. higher; longer c. similar; similar d. lower; shorter e. lower; longer
Which of the following is the correct sequence of hierarchical taxonomic categories?
A. species - family - genus - domain - order - phylum - class - kingdom B. domain - kingdom - phylum - class - order - family - genus - species C. species - genus - family - order - class - order - phylum - kingdom - domain D. kingdom - class - phylum - order - family - genus - species E. kingdom - class - domain - order - phylum - genus - family - species
Farmers sprayed litchi trees to suppress populations of scale insects. However, the spray also killed populations of a predatory lacewing that controlled the scales. Soon the spraying did no good, and the damage to the litchi from the scales was greater than before spraying had occurred. Few predatory lacewings exist in the trees now because
A. the scale insect was r-selected and the high number of young included a resistant strain; the predator was K-selected and will take longer to produce a resistant variety. B. the predator was r-selected and was therefore more susceptible to the spray. C. they, too, are insects so they are r-selected. D. the scale insect was K-selected and the high number of young included a resistant strain, while the predator was r-selected and will take longer to produce a resistant variety.
Genetic mutations in bacteria are very rare events; however the size of most bacterial populations ensures that genetic mutations will lead to unique bacteria on a regular basis.
A) True B) False