In Waller's experiment, he placed each of his feet into a pan containing ____

a. carbon dioxide
b. iron
c. mercury
d. pure water
e. salt solution


ANSWER: e

Biology & Microbiology

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Why doesn't a tapeworm have a mouth on its scolex?

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Lemon juice has a pH of 2.0, therefore, ____

a. [H+] < [OH-] b. [H+] = [OH-]

c. [H+] = 0 d. [OH-] = 0 e. [H+] > [OH-]

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Why was another nucleotide not added to the smallest fragment?

A) DNA polymerase became inactive after adding the last nucleotide. B) The last nucleotide added does not have a 3? hydroxyl group. C) The last nucleotide added does not have a 5? phosphate group. D) The DNA strand reached a length where it cannot grow any longer. E) DNA polymerase reached the end of the template.

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Spontaneous generation was a theory defined by:

A) Aristotle B) Francesco Redi C) Robert Hooke D) Louis Pasteur E) someone else

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