Most of the atmospheric oxygen occurs as a result of photosynthesis. From which of the following molecules is the oxygen derived?
A. NADH
B. glucose
C. carbon dioxide
D. chlorophyll
E. water
Answer: E
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Which early scientist proposed that cells arise only from preexisting cells by a process of division?
a. Anton van Leeuwenhoek b. Robert Brown c. Matthias Schleiden d. Theodor Schwann e. Rudolf Virchow
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a. bacteria. b. diatoms. c. foraminiferans. d. viruses. e. dinoflagellates.
A(n) ________ is a photograph using X-ray film that is used to identify the position of radiolabeled molecules on a gel
A) Southern blot B) northern blot C) X-rayogram D) autoradiogram E) radiocopy