Forest Stratification and Ecosystem Layers — NEET Biology
✅ Asked in NEET 2017(NEET 2017) Which ecosystem has the maximum biomass?
(NEET 2017) Which ecosystem has the maximum biomass?
Answer & NCERT explanation
Correct answer: D — Forest ecosystem
Forest ecosystems have the maximum biomass among the given options. This is because forests contain multiple layers of vegetation - canopy trees, understory, shrubs, and ground vegetation - creating enormous standing biomass. The massive tree trunks, branches, and root systems accumulate organic matter over decades or centuries. NCERT clearly states that terrestrial ecosystems, particularly forests, have much higher biomass than aquatic ecosystems due to woody plant structures.
Read more NCERT concept on the PYQ
Interaction of biotic and abiotic components result in a physical structure that is characteristic for each type of ecosystem. Identification and enumeration of plant and animal species of an ecosystem gives its species composition. Vertical distribution of different species occupying different levels is called stratification. For example, trees occupy top vertical strata or layer of a forest, shrubs the second and herbs and grasses occupy the bottom layers.
NTA tests whether students understand vertical stratification in ecosystems, where different organisms occupy distinct layers based on light and space availability. Trees form the top canopy layer, shrubs the middle layer, and herbs/grasses the bottom layer. Students often confuse stratification with zonation or forget that stratification is about vertical distribution within a single ecosystem. The key to remember: stratification shows *height-based layers* in the same ecosystem (like a forest), not horizontal distribution. This concept appears in NEET because it demonstrates how ecosystems maximize space utilization and energy capture at different heights, which relates to biomass distribution and energy flow.
What does NCERT say about Interaction biotic and abiotic?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
88/90MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.