The use of radiation to kill microorganisms that grow on food has been shown to be safe and effective.

a. true
b. false


a. true

Biology & Microbiology

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Chromosomes condense during what phase of mitosis?

a. prophase b. prometaphase c. metaphase d. anaphase

Biology & Microbiology

Facilitated diffusion differs from simple diffusion in that facilitated diffusion __________.

a. is an ion pump b. needs ATP c. requires a protein carrier d. doesn't need a gradient e. requires a protein carrier

Biology & Microbiology

Meiosis is to gametes as fertilization is to

A. mitosis. B. sperm. C. egg. D. zygote. E. chromosome.

Biology & Microbiology

Lichens are used by scientists as an indicator of pollution because they

a. require nonpolluted water to grow. b. are extremely sensitive to sulfur dioxide. c. react to small amounts of carbon monoxide. d. are very sensitive to ultraviolet radiation. e. respond to increased levels of chlorofluorocarbons.

Biology & Microbiology