In older woody plants, the epidermis of the stem is replaced by
A. collenchyma.
B. tracheids.
C. periderm.
D. trichomes.
Answer: C
Biology & Microbiology
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Each of the V domains in immunoglobulins has ________ complementarity-determining regions
A) one B) two C) three D) four
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Nucleic acid techniques have great power as diagnostic tools because they may be
A. very specific. B. quick and easy to perform. C. used to enhance the growth of bacteria. D. used to selectively inhibit the growth of certain bacteria.
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You have been given vials of H2, Na, H2O, Hg, and CH4. What are the majority of your vials filled with?
A. Liquids at room temperature. B. Gases. C. Molecules. D. Carboxyls.
Biology & Microbiology
A human egg is approximately 100 µm in size. What is this equal to?
a. 10.0 mm b. 0.10 mm c. 0.010 mm d. 0.0010 mm
Biology & Microbiology