Spongiform encephalopathies are caused by
A. viruses.
B. prions.
C. bacteria.
D. humans.
B. prions.
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The most serious consequence of rubella is
A. encephalitis. B. meningitis. C. deafness. D. birth defects.
The fruits of legumes
A. are fleshy and sweet and are dispersed by birds. B. are winged and dispersed by wind. C. split down both sides and the seeds fall out. D. have corky hulls that make them buoyant and are dispersed by water. E. have hooks that cling to mammals and are dispersed by them.
Transformation is used in genetic engineering to ____
a. generate bacteria with an F factor for conjugation b. understand how bacteriophages transfer DNA to bacteria c. obtain large quantities of viruses for study d. produce large quantities of the inserted DNA to increase yields of a target product e. introduce new genes into a bacterium’s mitochondrial DNA
Which of the following is not one of the basic types of animal tissue?
1.epithelial 2.connective 3.muscle 4.vascular