MCQ
The net primary productivity of an ecosystem is
- ✓Total weight of green plants $-$ respiratory losses
- BTotal weight of green plants $+$ respiratory losses
- CRespiratory losses alone
- DNone of the above
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| List $I$ | List $II$ |
| $A$. Robert May | $1$. Species-Area relationship |
| $B$. Alexander von Humboldt | $II$. Long term ecosystem experiment using out door plots |
| $C$. Paul Ehrlich | $III$. Global species diversity at about $7$ million |
| $D$. David Tilman | $IV$. Rivet popper hypothesis |
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