Bleach has an approximate pH of 13, and pure water has a pH of 7. How much more basic is bleach than pure water?

A) 100×
B) 1,000×
C) 10,000×
D) 100,000×
E) 1,000,000×


E) 1,000,000×

Biology & Microbiology

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The existence of MZ twin pairs in which only one has autism suggests that

A) some MZ twins are really dizygotic. B) the environment contributes to autism. C) twins cannot become autistic. D) genes do not contribute to causing autism.

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Which of the following is false about the diatoms?

a. They have been around for millions of years. b. They are important marine primary producers. c. They have overlapping pillbox-like shells. d. Their shells are made of calcium carbonate. e. They are important in the global cycling of carbon.

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Prokaryotes reproduce asexually by the processes of binary fission, budding, and transformation. Indicate whether the statement is true or false

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How many different "lines" of antibiotics against TB are there?

A. four B. five or more C. one D. two E. three

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