The first organisms were
1). primitive eukaryotes
2). aerobic bacteria
3). prokaryotic
4). photosynthetic
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1. Oxygen is transported in blood mainly by
4. The enzyme that converts glucose to ethyl alcohol is :
5. Two elements which can form a large number of compounds are
6. The most commonly used chemicals in the artificial rainmaking or cloud seeding are
7. What is found in frequency modulation?
8. Which one of the following elements is least likely to be found in commercial fertilisers?