Which cell connection is correctly paired with its function?
A) desmosomes: form a water-tight seal between cells
B) tight junctions: join cells together but allow fluid to pass around them
C) gap junctions: prevent fluid flow between cells
D) tight junctions: act like Velcro to fasten cells together
E) gap junctions: allow salts, amino acids, and other materials to pass between cells
E) gap junctions: allow salts, amino acids, and other materials to pass between cells
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In monoecious species of plants, plants that have separate "male" and "female" flowers both on the
same plant, applications of gibberellin
a. cause all flowers formed to be "female". b. encourage proportionally more "male" flowers to develop. c. cause all flowers formed to actually be both "male" and "female". d. cause all flowers formed to be "male". e. encourage proportionally more "female" flowers to develop.
How many different amino acids make up
proteins?
a. 4 b. 8 c. 12 d. 16 e. 20
The atom present in all organic compounds is
a. carbon. b. oxygen. c. nitrogen. d. sulfur. e. hydrogen.
Which of the following microscopes takes advantage of slight differences in density of cellular components?
A. Scanning electron microscope B. Fluorescent microscope C. Phase contrast microscope D. None of these E. Transmission electron microscope F. Darkfield microscope