2018 source guide · Biology

NEET 2018 Biology Biodiversity and Conservation Questions

Use this page to connect the official 2018 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 100 verified questions →Check official NTA archive ↗

What to master

patterns, loss, hotspots, conservation methods and ecosystem value.

Original practice preview

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

Example 1 · difficulty 3/5

Match the invasive alien species (Column I) with the corresponding impact (Column II). Column I: (a) Eichhornia crassipes, (b) Lantana camara, (c) Parthenium hysterophorus, (d) Clarias gariepinus. Column II: (i) introduced for aquaculture; threatens native fish fauna, (ii) aquatic weed that chokes ponds and lakes, (iii) weed invading rangelands and croplands, (iv) shrub weed spreading across forest and grassland communities.

A. a-ii, b-iii, c-iv, d-i
B. a-ii, b-iv, c-iii, d-i
C. a-iv, b-ii, c-iii, d-i
D. a-ii, b-iii, c-i, d-iv

Example 2 · difficulty 4/5

Consider the following statements about recent extinctions and current threats: (i) The IUCN Red List (2004) documented 784 species extinctions during the preceding 500 years; (ii) Recently extinct animals named include the quagga, the thylacine and Steller's sea cow; (iii) At present about 32 per cent of known amphibian species face the threat of extinction; (iv) Nearly 80 per cent of all recorded extinctions have been caused directly by volcanic eruptions. Which statement is INCORRECT?

A. (i) only
B. (ii) and (iii) only
C. (i) and (iv) only
D. (iv) only

Example 3 · difficulty 2/5

Which observation best represents genetic diversity within a species?

A. Rauwolfia vomitoria populations in different Himalayan regions vary in the concentration and potency of reserpine
B. The Western Ghats contain more amphibian species than the Eastern Ghats
C. India contains deserts, mangroves, coral reefs and alpine meadows
D. Animals constitute more than 70 per cent of recorded species

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

Biodiversity and Conservation →

Frequently asked questions

Are these official NEET 2018 Biology Biodiversity and Conservation 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 2018 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.