In most ecosystems the pyramids of number, energy and biomass are:
AUnopened
BUnaltered
CUpright
DUpended
Answer & Solution
Correct answer: C. Upright
1. Producers usually outnumber and outweigh the herbivores.
2. Herbivores in turn outnumber and outweigh the carnivores.
3. In most ecosystems all the pyramids are upright.
4. So the answer is upright.
_Source: NCERT Class XII Biology, Ch 12 'Ecosystem'_
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