Gene pharming is the use of
A. transgenic plants to produce larger vegetables and sweeter fruits.
B. transgenic farm animals to produce pharmaceuticals.
C. bacteria for bioremediation.
D. STR profiling to determine evolutionary relationships among organisms.
Answer: B
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Acanthamoeba species
A. cause keratitis. B. are facultative parasites. C. cause encephalitis. D. All of the choices are correct.
Ricin is toxic because
a. it binds to eukaryotic DNA. b. it binds to eukaryotic mRNA. c. it blocks food from entering the cell. d. it inactivates ribosomes. e. it binds to nerve tissue and causes paralysis
Of all organisms, prokaryotes are
a. the smallest. b. the most abundant. c. the most metabolically diverse. d. the most widespread. e. all of these
Which microscope is extremely valuable for examining different layers of specimens and often involves the use of shadow casting?
a) Transmission electron microscope b) Scanning electron microscope c) Phase-contrast microscope d) Darkfield microscope