Скачать или смотреть Sensitivity and Response in Plants | Chapter 1 Part 1 | Class 10 Life Science (WBBSE)| Hinglish|

Welcome to this complete and powerful educational video designed specially for Class 10 Madhyamik (WBBSE) students, both Hindi medium and English medium.
This video covers Chapter: Sensitivity and Response in Plants, exactly based on the WBBSE prescribed syllabus, including every required sub-topic, diagrams, examples, explanations, and comparative tables.

This description contains full-length notes, keyword-rich explanations, and search-optimized content to help students learn faster, revise better, and score full marks in the Madhyamik Life Science Examination.


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🌱 What You Will Learn in This Video (According to WBBSE Syllabus)

✔ Living organisms and changing environment

Plants and animals live in an ever-changing world. These changes may be helpful, harmful, favourable, or unfavourable. To survive, organisms detect these changes and respond accordingly.

✔ Meaning of Sensitivity

Sensitivity means the ability of an organism to receive a stimulus and respond to it.

✔ Meaning of Stimulus

Stimulus is any change (light, touch, water, temperature, gravity, chemicals) that triggers a response.

✔ Why plant response is slow

Animals can move freely, but plants are anchored, so their responses appear slow.
Plants mostly show growth movements or turgor movements.

✔ Movements in Mimosa pudica (Touch-me-not plant)

A classic example of rapid plant movement.
When touched, its leaves fold due to sudden turgor change in pulvinus.

✔ Movements in Desmodium gyrans (Telegraph plant)

This plant shows rhythmic leaflet movement due to internal stimuli.

✔ Acharya Jagadish Chandra Bose’s Contribution

Bose scientifically proved that plants have sensitivity, can feel stimuli, and respond to them.
He invented the Crescograph to measure plant growth and response.


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🌿 Types of Plant Movements Explained in the Video

1️⃣ Tactic Movements (Taxis)

Movement of the entire organism toward or away from stimulus.
Examples:

Phototactic – Algae moving toward light

Chemotactic – Gametes moving due to chemical signals



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2️⃣ Tropic Movements (Tropism)

Directional growth movement towards/away from stimulus.

⭐ Phototropism

Plant shoots bend toward light.

⭐ Geotropism

Roots grow downward (positive), shoots grow upward (negative).

⭐ Hydrotropism

Roots grow toward moisture.

⭐ Chemotropism

Pollen tube grows toward ovule due to chemicals.


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3️⃣ Nastic Movements (Nastism)

Non-directional turgor movements depending on the type of stimulus.

⭐ Photonastic

Flower opening with light.

⭐ Thermonastic

Tulip flowers opening due to temperature.

⭐ Seismonastic

Mimosa leaves folding due to touch.

⭐ Chemonastic

Responses due to chemicals (example: growth due to hormones).


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📊 Comparison Table (Tactic vs Tropic vs Nastic Movements)

Feature Tactic Tropic Nastic

Nature of movement Entire organism Growth movement Turgor movement
Direction Towards/away stimulus In direction of stimulus Not dependent on direction
Examples Phototaxis Phototropism Seismonasty



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📚 Why This Video is Important for Class 10 Students

This video is created exactly according to the Madhyamik Life Science syllabus.
It includes:

Full explanations

Scientific diagrams

Clear definitions

Real-life examples

Comparison tables

Important terminology

Exam-special question patterns


Perfect for:
✔ Class 10 WBBSE Board
✔ Hindi Medium Students
✔ English Medium Students
✔ School exams
✔ Final Madhyamik Board Exam
✔ Chapter-wise revision
✔ Self-study

Class 10 Life Science
WBBSE Life Science Chapter
Sensitivity in plants
Response in plants
Mimosa pudica movement
Desmodium gyrans telegraph plant
Acharya Jagadish Chandra Bose contribution
Plant movements
Tropic movement explained
Tactic movement explained
Nastic movement explained
Phototropism
Hydrotropism
Geotropism
Seismonasty
Chemotropism
Class 10 biology
Madhyamik Life Science
Plant sensitivity WBBSE
Science class 10 chapter explanation
Hindi medium Madhyamik
English medium Madhyamik
WBBSE chapter 1 notes
Plant behaviour
Stimulus and response in plants
Growth movement in plants