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Q. What is the molecule that donates hydrogen for photosynthesis, in sulfur photosynthetic bacteria?
In sulfur photosynthetic bacteria the substance that donates hydrogen is hydrogen sulfide (H2S) not water. Therefore there is no liberation of molecular oxygen but there is production of molecular sulfur (S2) Oxygen and sulfur has same number of valence electrons.
Q What are the major morphological features of birds? Birds are animals that present aerodynamic bodies covered with feathers, pneumatic bones, anterior limbs transformed into
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