MCQ
Primary productivity:
- AIs equal to the standing crop of an ecosystem.
- BIs greatest in freshwater ecosystems.
- CIs the rate of conversion of light to chemical energy in an ecosystem.
- DIs inverted in some aquatic ecosystems
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| Column - $I$ | Column - $II$ |
| $(a)$ Parasitism | $(i)$ $++$ |
| $(b)$ Commensalism | $(ii)$ $+-$ |
| $(c)$ Amensalism | $(iii)$ $0+$ |
| $(d)$ Mutualism | $(iv)$ $0-$ |