Class 12 · Biodiversity and Conservation

Overexploitation & Species Extinction — NEET Biology

🔥 Predicted for NEET 2027
📖 NCERT Source

Many species extinctions in the last 500 years (Steller's sea cow, passenger pigeon) were due to overexploitation by humans. Presently many marine fish populations around the world are over harvested, endangering the continued existence of some commercially important species.

NCERT Biology · Class 12 · Chapter 13 · Paragraph 29
Why This May Be Tested in NEET 2027

Adjacent to a frequently-asked paragraph in the same chapter.

Practice This Concept
QuestionPredicted for NEET 2027

Match-the-Column: Column I (Cause) A. Habitat loss. B. Over-exploitation. C. Alien species invasion D. Co-extinction Column II (Example) i. Extinction of passenger pigeon ii. Nile perch in Lake Victoria iii. Obligate pollinator extinction iv. Amazon forest cleared for soy cultivation

📖 Solution & NCERT Explanation
View solution & NCERT explanation

Correct answer: D A–iv, B–i, C–ii, D–iii

Habitat loss is illustrated by the Amazon forest being cleared for soy cultivation, destroying natural ecosystems. Over-exploitation led to the extinction of the passenger pigeon, which was hunted excessively. Alien species invasion is exemplified by the Nile perch introduced into Lake Victoria, which wiped out native fish species. Co-extinction occurs when an obligate pollinator goes extinct, causing its dependent plant species to disappear as well.

❓ Frequently Asked Questions
What does NCERT say about Many species extinctions last?
Many species extinctions in the last 500 years (Steller's sea cow, passenger pigeon) were due to overexploitation by humans. Presently many marine fish populations around the world are over harvested, endangering the continued existence of some commercially important species.
Has this concept appeared in NEET?
High probability for NEET 2027. Adjacent to a frequently-asked paragraph in the same chapter.
Which chapter is this from?
Biodiversity and Conservation, Class 12 NCERT Biology.

Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.

176/180
of the ReNEET 2026 paper (all subjects) was already in the MedicNEET question bank

MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.

176 of 180 ReNEET 2026 questions traced to MedicNEET17,000+ Biology questionsHindi + English
Free to start · Hindi + English · 43,000+ questions · NEET 2026 pattern
Related Concepts from Biodiversity and Conservation
📘Practice all 39 NEET PYQs from Biodiversity and Conservation🔍See full Biodiversity and Conservation PYQ Analysis