Which of the following observations suggested that blending was, at best, an incomplete explanation for inheritance?
a. all of the choices
b. parents without freckles have children with freckles
c. a mating between a white and black horse rarely produced gray offspring
d. a cross between white-flowered and purple-flowered pea plants never produced lavender-flowered offspring
a
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Bacteria reproduce by:
a. meiosis. b. cell fusion. c. binary fission. d. cloning. e. auxospore formation.
The solvent, cohesive, and temperature stabilization
properties of water are due to its a. ability to promote hydrophilic interactions. b. ionic bonds. c. hydrogen bonds. d. ability to promote hydrophobic interactions. e. nonpolar nature.
The most accurate description of SPATIAL summation is
A. Several inputs from the SAME presynaptic cell arrive in rapid succession, summing into a larger depolarization that brings the neuron over the threshold for an action potential. B. Several inputs from DIFFERENT presynaptic cells create EPSPs that sum together to bring the neuron over the threshold for an action potential.
Radioisotopes are used in all of the following scientific applications except:a
dating fossils. b. determining the sequence of genetic information in DNA. c. localization of a drug, such as marijuana. d. the treatment of cancer. e. measuring the pH of the blood