Plant Growth Factors: Intrinsic vs Extrinsic — NEET Biology
📚 Practice ConceptIn this chapter, you shall also study some of the factors which govern and control these developmental processes. These factors are both intrinsic (internal) and extrinsic (external) to the plant.
Consider the following statements : 1. Development in plants is the sum of growth and differentiation. 2. All plant organs arise in a precise, ordered sequence from the zygote. 3. Leaves, flowers, and fruits of a tree continue to grow indefinitely like stems and roots. 4. In absence of favourable conditions, seeds enter a period of suspended growth or rest. 5. Intrinsic and extrinsic factors together govern plant growth and development. Which of the above statements are correct?
View solution & NCERT explanation
Correct answer: C — 1, 2, 4 and 5 only
Statement 1 is correct: Development is explicitly defined as the sum of growth and differentiation. Statement 2 is correct: A mature plant arises from the zygote in an ordered succession producing roots, leaves, flowers, fruits, and seeds. Statement 3 is incorrect: Unlike stems and roots, leaves, flowers, and fruits have limited dimensions and appear periodically. Statement 4 is correct: Seeds enter suspended growth or rest in the absence of favourable conditions. Statement 5 is correct: Both intrinsic (internal) and extrinsic (external) factors regulate growth and development.
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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.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.