2023 source guide · Biology

NEET 2023 Biology Ecology Questions

Use this page to connect the official 2023 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 3/5

When two closely related species of Paramecium were cultured together in the same medium with a fixed daily food supply, one species consistently grew, thrived and survived while the other was eliminated. This classic outcome illustrates:

A. Gause's competitive exclusion principle
B. Resource partitioning enabling coexistence
C. Character displacement leading to niche divergence
D. Facilitation between the two species

Example 2 · difficulty 1/5

The koel (cuckoo) lays its eggs in the nest of a crow, and the crow incubates the eggs and feeds the chicks as its own. This specialised interaction is termed:

A. Mutualism
B. Commensalism
C. Predation
D. Brood parasitism

Example 3 · difficulty 4/5

A census of a deer population shows that 60% of individuals are below reproductive age, 25% are of reproductive age, and 15% are past reproductive age. Predict the shape of the age pyramid and the likely future trend of this population:

A. Bell-shaped; population expected to remain stable
B. Triangular with a broad base; population expected to expand
C. Urn-shaped; population expected to decline
D. Rectangular column; population expected to remain stable

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 2023 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 2023 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.