Class 12 · Organisms and Populations

Levels of Biological Organisation — NEET Biology

🔥 Predicted for NEET 2027
📖 NCERT Source

Ecology is basically concerned with four levels of biological organisation – organisms, populations, communities and biomes. In this chapter we explore ecology at population levels.

NCERT Biology · Class 12 · Chapter 11 · Paragraph 6
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

Why is population considered the basic unit for studying evolution rather than individual organisms?

📖 Solution & NCERT Explanation
View solution & NCERT explanation

Correct answer: C Natural selection acts on population traits

While individuals face environmental changes, evolution via natural selection occurs at the population level through gene pool changes.

❓ Frequently Asked Questions
What does NCERT say about Ecology basically concerned with?
Ecology is basically concerned with four levels of biological organisation – organisms, populations, communities and biomes. In this chapter we explore ecology at population levels.
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?
Organisms and Populations, 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
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