Which of the following describes an advantage of delayed reproduction in organisms?
a. decreased threats from predators
b. decreased reproductive energy budget
c. increased potential for parental care
d. increased opportunities for mating
c. increased potential for parental care
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A molecular clock is based on
a. measurement of daylength by pigment complexes. b. daily changes in amino acid sequence in specialized proteins. c. regulation of the order in which genes are turned on. d. precise oscillations of atoms in a crystal. e. a constant rate of mutation in DNA sequences.
Which theory was helpful to Darwin in the
formulation of his theory of evolution? a. catastrophism b. inheritance of acquired characteristics c. uniformitarianism d. continental drift e. special creationism
If red bone marrow can be surgically removed from an individual, what would happen to that person in terms of the formed elements of the blood?
What will be an ideal response?
An instrument that magnifies slight differences in the refractive index of cell structures is called a (n) ________ microscope.
A. densitometric B. electron C. fluorescence D. phase-contrast