Science · Class 7
Reproduction in Plants
Asexual and sexual reproduction; pollination and seed dispersal.
4 sections15–25 min read6 MCQs · 2 examples
Chapter Overview
Plants reproduce by asexual methods (vegetative propagation, budding, fragmentation) and sexual reproduction through flowers, pollination, fertilisation, seed and fruit formation.
Asexual Reproduction
- Budding: yeast, Hydra
- Fragmentation: Spirogyra
- Vegetative propagation: potato (tubers), ginger (rhizome), Bryophyllum (leaf buds), sugarcane (stem)
- Advantages: fast, identical offspring
Sexual Reproduction
- Pollination: transfer of pollen to stigma (self or cross)
- Agents: wind, water, insects, birds
- Fertilisation: male gamete + female gamete in ovule
- Ovary → fruit; ovule → seed
Seed Dispersal
- Wing (maple), hooks (Xanthium), fleshy fruits eaten by animals, water (coconut)
Solved Examples
Step-by-step solutions — read each step before checking the final answer.
Vegetative propagation
Name three plants grown without seeds.
- 1Potato — tuber
- 2Ginger — rhizome
- 3Rose — stem cutting
Answer
Tuber, rhizome, cutting
Pollination
Distinguish self and cross pollination.
- 1Self: pollen to same flower/stigma
- 2Cross: pollen to different flower
- 3Cross increases variation
Answer
Self: same plant | Cross: different plant
Key Points to Remember
- ✓ Unisexual flower: one sex (papaya)
- ✓ Bisexual: both stamen and pistil (Hibiscus)
- ✓ Hybridisation improves crop varieties
Exam Tips
- • Draw labelled parts of flower
- • List vegetative propagation examples
- • Explain seed dispersal methods
Practice MCQs — Reproduction in Plants
Test your understanding with topic-wise multiple choice questions. Explanations appear after each answer.
Question 1 of 6Score: 0/0
Pollen lands on: