2020 source guide · Biology

NEET 2020 Biology Ecology Questions

Use this page to connect the official 2020 paper with current Biology practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.

Practice 318 verified questions →Check official NTA archive ↗

What to master

populations, communities, ecosystems, biodiversity and conservation.

Original practice preview

These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.

Example 1 · difficulty 2/5

The pyramid of biomass in a sea ecosystem is inverted mainly because:

A. Phytoplankton lack chlorophyll and cannot be weighed accurately
B. Energy transfer between successive trophic levels in oceans exceeds 10%
C. The standing crop of phytoplankton at any given time is smaller than the biomass of the zooplankton and fish feeding on them
D. Marine food chains are always longer than terrestrial food chains

Example 2 · difficulty 3/5

According to Lindeman's ten per cent law, if the producers in an ecosystem capture 10,000 kJ of energy, the energy transferred to a tertiary consumer would be:

A. 10 kJ
B. 100 kJ
C. 1,000 kJ
D. 10,000 kJ

Example 3 · difficulty 4/5

In hydrarch succession beginning in open water, which of the following sequences of seral stages is correct?

A. Rooted submerged hydrophytes → phytoplankton → reed-swamp → marsh-meadow → forest
B. Phytoplankton → rooted floating hydrophytes → rooted submerged hydrophytes → marsh-meadow → scrub → forest
C. Phytoplankton → reed-swamp → rooted submerged hydrophytes → scrub → marsh-meadow → forest
D. Phytoplankton → rooted submerged hydrophytes → rooted floating hydrophytes → reed-swamp → marsh-meadow → scrub → forest

The evidence-first practice loop

1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
2. Attempt closed-bookExpose the concept or execution gap before rereading.
3. Repair and returnClassify the miss and re-practice after a delay.

Canonical chapter practice

Organisms and Populations →Ecosystem →Biodiversity and Conservation →

Frequently asked questions

Are these official NEET 2020 Biology Ecology PYQs?

No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.

How should I use the NEET 2020 paper?

Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.