Question
Why are honey bees called as best pollinators?
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| Column A (Scientist) | Column B (Theory) |
| (1) Munch | (a) Proton transport theory |
| (2) Bohem | (b) Pressure flow theory |
| (3) J. Pristley | (c) Capillary theory |
| (4) Levitt | (d) Root Pressure theory |
| Column I (Organic Acids] | Column II (Microbial source) |
| (1) Citric acid | (a) Rhizopus arrhizus |
| (2) Fumaric acid | (b) Acetobacter aceti |
| (3) Gluconic acid | (c) Aspergillus niger |
| (4) Acetic acid | (d) Aspergillus niger |