The basic unit of living organisms, which can carry out all of the necessary functions of life is the ______
Fill in the blank(s) with the appropriate word(s).
Answer: Cell
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If you wished to study the SOS response in Escherichia coli, which of the following experimental procedures could be used?
A. Inactivate genes that encode DNA polymerases. B. Expose cells to ionizing radiation for 10 minutes. C. Transfer log phase cells from complete medium to thymine minimal medium. D. Expose cells to nonionizing radiation for 20 minutes. E. All of the choices are correct.
Phytophthora, a pathogen attacking a wide variety of plants, is a(n):
A. alga B. protist C. lichen D. fungus E. bacterium
Syndrome means
a. a chromosome disorder. b. a simple genetic disease. c. a set of symptoms that occur together. d. an incurable disease. e. a rare inborn defect.
The immune system consists of two components: ________ and ________.
A) leukocytes : lymphoid tissues B) plasma cells : cytotoxic T cells C) lymphocytes : phagocytes D) leukocytes : lymphocytes E) antigens : antibodies