Inflammation of the membranes around the brain or spinal cord is called ________.
Fill in the blank(s) with the appropriate word(s).
meningitis
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Which of the following results in a spontaneous mutation?
A. free radicals produced by cellular metabolism B. exposure to ultraviolet light C. exposure to benzo (a)-pyrene, a chemical substance found in cigarette smoke D. exposure to ultraviolet light and benzo (a)-pyrene E. exposure to X-rays
Ribozymes
a. are RNA catalysts. b. are proteins that catalyze RNA synthesis. c. are RNA molecules that slow the rate of protein synthesis. d. are the products of RNA degradation. e. are amino acids that catalyze RNA synthesis
Because of the _____________________, traits carried by early settlers are found in a large fraction of the descendent
population. Fill in the blank(s) with the appropriate word(s).
Evolutionary modifications that improve the survival and reproductive success of an organism arecalled:a
mutations. b. vestigial structures. c. homoplastic traits. d. artificial traits. e. adaptations.