Question

The upright pyramid of number is absent in ?

• A. aquatic
• B. grassland
• C. Both a and b
• D. forest

Answer 1

The correct option is D forest

• Pyramid of number indicates the number of individuals at trophic level.
• It is upright in lake ecosystem, grassland ecosystem, aquatic ecosystem. However, it is spindle shaped in forest ecosystem.
• The number of producers, that is plants are less in number. Primary consumers feeding upon primary producers are maximum in number followed by secondary consumers followed by tertiary consumers.
• So, (D) is the correct answer.