The bacterial genera that produces pigments which protect plant leaves from UV irradiation is ________.
A. Nocardia
B. Sphingomonas
C. Arthrobacter
D. Cellulomonas
Answer: B
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In multiple sclerosis, autoantibodies attack
A. acetylcholine receptors on smooth muscle. B. sodium pump proteins in the cell membrane. C. myelin sheath cells of the nervous system. D. acetylcholine receptors on skeletal muscle. E. cells in thyroid follicles.
A solution is a uniform mixture in which a ____ is dissolved completely in a ____
a. salt; solute b. solute; salt c. solute; solvent d. solvent; salt e. solvent; solute
The chambers of the brain are the
a. ventricles. b. meninges. c. tectum. d. olfactory and optic bulbs. e. pineal glands.
Which of the following statements concerning decomposers is false?
a. They act with detritivores to break down and recycle organic matter. b. They are microbial heterotrophs. c. They include bacteria but not fungi. d. They use the products of decomposition to supply themselves with energy. e. They are also called saprotrophs