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Political Science NCERT Solutions Class 7 Science Chapter 10 – Life Processes in Plants
Class 7 Science
Last Updated: 31 May 2026
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Important Points
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Practice MCQ Questions (46 questions)
Q1. What are the essential requirements for plant growth?
✓ Correct Answer: C
Q2. Which part of the plant is called the 'food factory'?
✓ Correct Answer: C
Q3. What is the green pigment in leaves called?
✓ Correct Answer: B
Q4. What is the process of food production in plants called?
✓ Correct Answer: C
Q5. Which test is used to detect starch in leaves?
✓ Correct Answer: B
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Frequently Asked Questions (FAQ)
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Tough Words (Glossary)
Growth
Meaning: Increase in size or number
अर्थ: वृद्धि
"Plants show growth in height and leaves."
Nutrient
Meaning: A substance that helps growth and health
अर्थ: पोषक तत्व
"Leaves make nutrients for the plant."
Carbohydrate
Meaning: Energy‑giving food group like starch and sugar
अर्थ: कार्बोहाइड्रेट
"Starch is a carbohydrate stored in leaves."
Protein
Meaning: Food group that builds body tissues
अर्थ: प्रोटीन
"Seeds are rich in proteins."
Vitamin
Meaning: Essential substances needed in small amounts
अर्थ: विटामिन
"Fruits provide many vitamins."
Mineral
Meaning: Natural substance needed for growth
अर्थ: खनिज
"Roots absorb minerals from soil."
Explore
Meaning: To study or find out more
अर्थ: खोज करना/समझना
"We explore how plants get food."
Lifespan
Meaning: The length of time a living thing lives
अर्थ: जीवनकाल
"A plant’s lifespan can be many years."
Emerge
Meaning: To come out or appear
अर्थ: उभरना/निकलना
"New leaves emerge in spring."
Thicken
Meaning: To become thicker
अर्थ: मोटा होना
"The stem thickens as the plant grows."
Regularly
Meaning: At equal time intervals; often
अर्थ: नियमित रूप से
"Water the plants regularly."
Contribute
Meaning: To help cause something
अर्थ: योगदान करना
"Sunlight contributes to plant growth."
Root
Meaning: Part of a plant that absorbs water and minerals
अर्थ: जड़
"Roots hold the plant in the soil."
Neighbourhood
Meaning: Area around your home
अर्थ: आस‑पास का इलाका
"Observe plants in your neighbourhood."
Explanation
Meaning: A reason that makes something clear
अर्थ: व्याख्या/स्पष्टीकरण
"Give your explanation for the changes."
Earthen
Meaning: Made of baked clay
अर्थ: मिट्टी का
"Use an earthen pot for the activity."
Sapling
Meaning: A young plant
अर्थ: पौधा/नवांकुर
"Plant equal‑sized saplings in pots."
Label
Meaning: To put a name tag on something
अर्थ: लेबल लगाना/नाम लिखना
"Label the pots A, B, and C."
Moist
Meaning: Slightly wet
अर्थ: नम
"Keep the soil slightly moist."
Adequate
Meaning: Enough; sufficient
अर्थ: पर्याप्त
"Give adequate water daily."
Observe
Meaning: To watch carefully
अर्थ: अवलोकन करना
"Observe the plants for two weeks."
Record
Meaning: To write down what you see
अर्थ: लिखित रूप में दर्ज करना
"Record height and leaf number."
Analyse
Meaning: To study data to find meaning
अर्थ: विश्लेषण करना
"Analyse the table of observations."
Infer
Meaning: To conclude from evidence
अर्थ: अनुमान/निष्कर्ष निकालना
"We infer plants need water and light."
Indicate
Meaning: To show or point out
अर्थ: दर्शाना/सूचित करना
"The blue‑black colour indicates starch."
Essential
Meaning: Absolutely necessary
अर्थ: अनिवार्य/आवश्यक
"Sunlight is essential for photosynthesis."
Photosynthesis
Meaning: Plants making food using light, CO₂ and water
अर्थ: प्रकाश‑संश्लेषण
"Leaves do photosynthesis in sunlight."
Chlorophyll
Meaning: Green pigment in leaves that traps light
अर्थ: हरितलवक/क्लोरोफिल
"Chlorophyll gives leaves their green colour."
Pigment
Meaning: A substance that gives colour
अर्थ: वर्णक
"Red pigments can hide the green."
Starch
Meaning: Stored form of carbohydrate in plants
अर्थ: स्टार्च/मंड
"Leaves store extra food as starch."
Iodine
Meaning: Chemical that turns blue‑black with starch
अर्थ: आयोडीन
"Iodine is used to test starch."
Decolourise
Meaning: To remove colour
अर्थ: वर्णहीन करना
"Boiling alcohol decolourises the leaf."
Dilute
Meaning: Made weaker by adding water
अर्थ: सांद्रता कम करना/पतला
"Use dilute iodine solution."
Flammable
Meaning: Catches fire easily
अर्थ: ज्वलनशील
"Alcohol is highly flammable."
Demonstration
Meaning: A teacher‑shown practical activity
अर्थ: प्रदर्शन/डेमोंस्ट्रेशन
"This is a demonstration activity."
Destarch
Meaning: To remove stored starch by keeping in dark
अर्थ: स्टार्च हटाना/डेस्टार्च करना
"Keep the plant in dark to destarch."
Caustic soda
Meaning: Sodium hydroxide, absorbs CO₂
अर्थ: कॉस्टिक सोडा (सोडियम हाइड्रॉक्साइड)
"Caustic soda absorbs carbon dioxide."
Carbon dioxide
Meaning: Gas used by plants to make food
अर्थ: कार्बन डाइऑक्साइड
"Plants take in carbon dioxide from air."
Synthesis
Meaning: The making of a substance
अर्थ: संश्लेषण
"Glucose is formed by synthesis in leaves."
Glucose
Meaning: Simple sugar made in photosynthesis
अर्थ: ग्लूकोज़/शर्करा
"Glucose is an instant energy source."
Oxygen
Meaning: Gas released by plants in photosynthesis
अर्थ: ऑक्सीजन
"Photosynthesis releases oxygen."
Bubbles
Meaning: Small balls of gas in liquid
अर्थ: बुलबुले
"Bubbles collect in the test tube."
Invert
Meaning: To turn upside down
अर्थ: उल्टा रखना
"Keep the test tube inverted."
Microscope
Meaning: Instrument to see tiny things
अर्थ: सूक्ष्मदर्शी
"See the peel under a microscope."
Stomata
Meaning: Tiny pores on leaves for gas exchange
अर्थ: रंध्र/स्टोमेटा
"Stomata help exchange gases."
Peel
Meaning: Thin layer taken from a leaf surface
अर्थ: छिलका/त्वचा
"Peel the lower surface gently."
Forceps
Meaning: Tool to hold small objects
अर्थ: चिमटी
"Lift the peel with forceps."
Coverslip
Meaning: Thin glass used to cover a specimen
अर्थ: कवरस्लिप
"Place a coverslip over the peel."
Transport
Meaning: To move substances from one place to another
अर्थ: परिवहन/परिवहन करना
"Plants transport water and food."
Xylem
Meaning: Tubes that carry water and minerals up
अर्थ: जाइलम
"Xylem carries water to leaves."
Phloem
Meaning: Tubes that carry prepared food
अर्थ: फ्लोएम
"Phloem transports food to roots."
Twig
Meaning: Small thin branch of a plant
अर्थ: टहनी
"Place the twig in coloured water."
Obliquely
Meaning: At a slant; not straight
अर्थ: तिरछे
"Cut the stem obliquely under water."
Tender
Meaning: Soft and young
अर्थ: कोमल
"Use tender plant twigs."
Dissolve
Meaning: To mix completely in a liquid
अर्थ: घुलना/घोलना
"Minerals dissolve in water."
Respiration
Meaning: Breaking down food to release energy
अर्थ: श्वसन
"Seeds release CO₂ during respiration."
Lime water
Meaning: Clear solution to test carbon dioxide
अर्थ: चूना जल
"CO₂ turns lime water milky."
Conical flask
Meaning: A flask with a wide base and narrow neck
अर्थ: शंक्वाकार फ्लास्क
"Keep seeds in a conical flask."
Cork
Meaning: A stopper used to close a flask
अर्थ: डाट/कॉर्क
"Fit two tubes through the cork."
Rubber tube
Meaning: Flexible tube used to connect apparatus
अर्थ: रबर नली
"Join the flask to the test tube with a rubber tube."