Viruses always lack which of the following?
A. organelles
B. an envelope
C. a protein coat
D. genetic material
E. None of the answer choices is correct.
A. organelles
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The Ti plasmid is best suited for genetically manipulating
A) Agrobacterium spp. B) fish. C) plants. D) viruses.
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.
Mast cells release histamine.
a. true b. false
There are three aspects of entire populations that are important and often studied. Select the best choice from the ones listed.
A. a population's range, the amount of food available within the range, and the size that the population attains B. a population's range, the dispersal of individuals within the range, and the size that the population attains C. a population's range, the parental care received by each offspring within the population, and the size that the population attains D. a population's range, the size home range of an individual in the population, and the parental care expended for each offspring