If a bacterial smear were stained with a blue basic stain, then counterstained with a red acidic stain, one would expect to see ________.
a. Red cells against a blue background
b. Blue cells against a red background
c. Red and blue cells against a colorless background
d. Red acid-fast cells
Answer: b. Blue cells against a red background
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Which genetic mechanism is most likely responsible for the evolutionary origin of new and complex plant structures,
such as flowers?
a. gene duplication b. asexual reproduction c. genes coding for flower development d. mutations in noncoding regions e. gene splicing
After a steroid hormone binds its receptor, the hormone-receptor complex then:a
activates a G protein. b. activates a protein kinase. c. activates adenylyl cyclase. d. activates calmodulin. e. binds DNA.
Western Oregon generally has cooler summer temperatures and warmer winter temperatures than do same-latitude states that are inland; similarly, Cape Cod (a coastal peninsula southeast of Boston) generally has a more moderate climate than interior
Massachusetts does. Why?
What is unique about transduction compared to normal bacteriophage infection?
a. Transduction transfers DNA from the chromosome of one cell to another. b. The bacteriophage does not erupt from an infected cell during transduction. c. The bacteriophage takes fragments of the cell with it during transduction.