One way that the development of drug resistance in viruses has been reduced has been by the use of a cocktail of several drugs at high doses.
Answer the following statement true (T) or false (F)
True
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Fluorescent staining is more sensitive than conventional carbolfuchsin stains. What counterstain is used during the procedure?
a. Methylene blue b. Crystal violet c. Potassium permanganate d. Auramine-rhodamine
Brucella infections usually result in which type of bacteremia?
a. Transient b. Intermittent c. Continuous d. Spontaneous
Your friends, who own a large citrus orchard, invited you to have dinner yesterday, and when you arrived, you found they had prepared a veritable feast on their patio. While dining, you discovered that the trees providing shade from the evening sun bore a variety of citrus fruit, including lemons, limes, oranges, and grapefruit – not on separate trees, as you would expect, but rather each of those trees were heavy with two or more types of citrus fruit each. One of your friends, noticing your amazement, laughed and said, “We planted fruit-salad seeds.” Obviously, that’s not the explanation, but how else could they have created their small fruit-salad canopy?
a. Lemons, limes, oranges, and grapefruit are the same fruit grown with exposure to various hormones. b. Pollen from multiple species are able to cross-fertilize, producing multiple unique fruit on each tree. c. Citrus trees are closely related, allowing for scions of multiple species to be grafted together. d. Blending together calluses from related plant species allows for the growth of chimerical plants.
____ of our food crops are the fruits of angiosperms
a. About 10% b. About 25% c. About half d. Nearly all e. Hardly any