Class 12 · Human Reproduction

Germ Layers and Stem Cell Differentiation — NEET Biology

🔥 Predicted for NEET 2027
📖 NCERT Source

A mesoderm soon appears between the ectoderm and the endoderm. These three layers give rise to all tissues (organs) in adults. It needs to be mentioned here that the inner cell mass contains certain cells called stem cells which have the potency to give rise to all the tissues and organs.

NCERT Biology · Class 12 · Chapter 2 · Paragraph 34
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 early differentiation of germ layers (ectoderm, mesoderm, endoderm) essential in embryogenesis?

📖 Solution & NCERT Explanation
View solution & NCERT explanation

Correct answer: D They give rise to all adult organs

All tissues and organs arise from these three layers.

❓ Frequently Asked Questions
What does NCERT say about mesoderm soon appears between?
A mesoderm soon appears between the ectoderm and the endoderm. These three layers give rise to all tissues (organs) in adults.
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?
Human Reproduction, Class 12 NCERT Biology.

Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.

88/90
of the NEET 2026 Biology paper matched from 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.

88 of 90 NEET 2026 Biology questions traced to MedicNEET14,000+ Biology questionsHindi + English
Free to start · Hindi + English · 22,000+ questions · NEET 2026 pattern
Related Concepts from Human Reproduction
📘Practice all 38 NEET PYQs from Human Reproduction🔍See full Human Reproduction PYQ Analysis