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B
15C and 32P
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C
16C and 15N
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D
14C and 18O
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Solution
The correct option is D14C and 18O
Photosynthetic rates of the large centric diatom Coscinodiscus granii were measured by means of multicolor variable chlorophyll fluorescence imaging, single cell 14C assimilation, and optical O2sensor measurements during light.
18O was used to prove that water is the molecule from which oxygen is liberated during photosynthesis.