The fact that the type R and S strains of Streptococcus pneumoniae that Griffith worked with possessed small differences in capsule structure satisfies which of the following criteria for genetic material?
A. Transmission
B. Replication
C. Information
D. Variation
D
You might also like to view...
Which of the following statements does NOT describe a function of the cell walls of bacteria?
A. They maintain cell shape. B. They prevent cross-fertilization. C. They avoid disintegration in water with low concentrations of salt. D. They protect against other bacteria. E. They protect against viruses.
Members of the ____ Lophotrochozoan phylum are acoelomate, dorsoventrally flattened,and do not have circulatory
or respiratory systems.
a. Rotifera b. Mollusca c. Platyhelminthes d. Annelida e. Nemertea
Which of the following statements is false?
a. Synaptic potentials may vary in magnitude. b. Synaptic integration sums arriving signals over space and time. c. An excitatory postsynaptic potential is hyperpolarizing, whereas an inhibitory postsynaptic potential is depolarizing. d. Synaptic integration means that signals arriving at a neuron can be reinforced or dampened. e. Synaptic integration means that signals arriving at a neuron can be sent on or suppressed.
A drug called Coumadin interferes with the action of vitamin K in the liver. What effect will Coumadin have on blood-clotting mechanisms?
A) Coumadin will make it necessary for the patient to eat extra leafy green vegetables. B) Vitamin K will not be absorbed from the digestive tract. C) The liver will not be able to produce needed clotting factors. D) Nothing, because vitamin K is not necessary for blood clotting.