📚 CBSE Grade-10 Study Guide
HomeScience (086) (AI practice)

Science (086) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [2] medium thorough-understanding
A plant produced from seed takes several years to flower for the first time, while a plant of the same species grown by vegetative propagation flowers within a year. What explains this difference?
Generated by claude-sonnet-4-6 · 2026-06-26 01:05 · grounding rag
Model Answer

Plants produced from seeds must first complete a long juvenile phase before they can flower. In contrast, plants grown by vegetative propagation are developed from mature parent tissue that has already passed this juvenile stage, so they can bear flowers and fruits earlier than seed-grown plants.

Source: Chapter 7, Section 7.2.5 – Vegetative Propagation

---

Explanation

The key phrase from the textbook is: "Plants raised by vegetative propagation can bear flowers and fruits earlier than those produced from seeds." Examiners expect you to explain why — the vegetative part comes from a mature plant, so it skips the juvenile/seedling phase. Mention both sides: seed-grown = long juvenile phase; vegetatively propagated = mature tissue, no juvenile phase. Two clear points = 2 marks.

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.