Video narration
Pauda dukaan par jaaye baghair apna khaana kaise banaata hai? Sochiye, jaise aap tarkeeb banaate hain, waise pauda bhi patte mein ajza jama karta hai. Magar sooraj ki roshni khaana nahin; yeh tarkeeb chalaane waali tawanai hai. Jarrain mitti se paani laati hain, patte hawa se carbon dioxide lete hain, aur sooraj roshni deta hai. Patte mein teenon mil kar glucose, yaani paude ki shakar, tayyar karte hain. Yahi mor hai: roshni khud shakar nahin banti; woh paani aur carbon dioxide ko shakar mein badalne ki taaqat deti hai. Glucose tawanai aur barhotri ke kaam aata hai. Tarkeeb ka doosra nateeja oxygen hai, jo patte se nikal kar hawa mein shaamil ho jaati hai. Is amal ko photosynthesis, yaani ziyaai taleef, kehte hain. To pauda khareedaari nahin karta: sooraj tarkeeb chalaata hai, paani aur carbon dioxide se glucose banta hai, aur oxygen khaarij hoti hai.