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Class 12 Biology — Chapter 11: Organisms and Populations
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Free NCERT-aligned multiple-choice practice for Class 12 Biology, Chapter 11 (Organisms and Populations). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 90.
Sample questions
Q1Easy
Both species benefit:
A.Mutualism (+/+)✓ correct
B.Predation
C.Parasitism
D.Competition
Why
e.g., bees and flowers.
Q2Medium
Logistic growth has:
A.S-shaped (sigmoid) curve with carrying capacity✓ correct
B.J-shaped
C.Linear
D.Random
Why
Limits at K (carrying capacity).
Q3Hard
Gause's competitive exclusion principle:
A.Two species with identical niches cannot coexist indefinitely✓ correct
B.All species share resources equally
C.Predators always win
D.None
Why
One eventually outcompetes.
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