Which of the following statements regarding vision is NOT true?
A. Vertebrate rods and cones hyperpolarize in response to light.
B. Insects and birds can often see into the ultraviolet range.
C. Bright light will often produce action potentials in both rods and cones.
D. Rhodopsin is found in the membrane of rods.
C. Bright light will often produce action potentials in both rods and cones.
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The class of macromolecules in microorganisms that contributes MOST to biomass is
A) carbohydrates. B) DNA. C) lipids. D) proteins.
Looking out your window, you may notice that the bark of a nearby oak tree has a mosaic appearance, consisting of deep fissures and relatively flat areas. What accounts for this mosaic appearance? Select all correct choices
A. the formation of new cork cambia as old cork cambia grow away from the phloem B. the formation of new secondary phloem in distinct, discontinuous patches C. the formation of new cork cambia in distinct, discontinuous patches D. the formation of new vascular cambia as old cork cambia grow away from the phloem
Cohesins are multisubunit protein complexes that
A) hold sister chromatids together. B) ensure that proper chromosome arm length is maintained. C) allow easy karyotyping. D) allow replication of chromosome ends.
Describe the mutagenic action of the following two mutagens: 5-bromouracil and ultraviolet light
What will be an ideal response?