Rod cells differ from cone cells in that
a. rod cells respond to changes in light
intensity, and cone cells detect very dim
light.
b. rod cells contain pigments which enable the
perception of color, and cone cells respond
to changes in light intensity.
c. rod cells respond to changes in light
intensity, and cone cells contain pigments
which allow for the perception of color.
d. rod cells are responsible for acute daytime
vision, and cone cells detect very dim light.
e. they are none of these.
C
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Which type of microscopy has the greatest resolving power?
A) electron microscopy B) phase-contrast microscopy C) fluorescence microscopy D) digital video microscopy E) confocal scanning microscopy
Fossils show that this animal lived in the dark ocean. Each animal had a disc or a holdfast to attach it to the deep ocean floor.
Most steroid hormones are synthesized from
A) amino acids. B) insulin. C) linoleic acid. D) cholesterol. E) glucose.
Evolution, viewed on a small scale, as it relates to changes in a single gene or allele frequency in a population over time, is called
A. genetic evolution. B. macroevolution. C. phenotypic evolution. D. speciation. E. microevolution.