Which part of the flame of a Bunsen burner is used for sterilization of inoculating tools?
A) The tip of the inner cone
B) The tip of the outer cone
A) The tip of the inner cone
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A mast cell is similar to a basophil in that both
A. are types of white blood cells. B. are vasoactive mediators. C. are agranulocytic. D. act as primary phagocytes. E. None of the choices are correct.
If a large 10-km asteroid or comet struck the Earth in the ocean floor, I. large amounts of molten rock would rain down on Earth and cause massive forest fires. II. giant tidal waves would result III. after effects would cause the deaths of most animal life on the planet. IV. thick clouds of dust would form and block out the Sun for an extended period
a. I & IV b. II & III c. I, II, & III d. I, II, III & IV e. II, III, & IV
If the product of one gene is masked by another, the hidden gene is said to be ________ to the masking gene.
Fill in the blank(s) with the appropriate word(s).
Unlike vessel elements, ____________ have no perforation plates.
Fill in the blank(s) with the appropriate word(s).