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Aas-paas Paudhon aur Jaanwaron ki Vividhta

Class 6 Science · Chapter 2: Jeevan ki Vividhta · NCERT Curiosity section 2.1

Seekho

Kabir aur Tenzin copy lekar school ke aas-paas nature walk par jaate hain. Sirf ek ghante mein wo 14 tarah ke paudhe aur 11 tarah ke jaanwar likhte hain: cheentiyaan, maina, gilahri, titliyaan, chhipkali … Jeevon ki is badi vividhta ko diversity kehte hain.

Paudhon ko tane se group kar sakte hain. Herbs ke tane naram, hare aur chhote (pudina, gehun, tulsi). Shrubs ghani jhaadi, zameen ke paas se kai sakht tane (gulaab, gudhal). Trees lambe, ek mota lakdi ka tana (aam, neem).

Patton ko dhyaan se dekho. Patte ki lines uski nasein hain. Ghaas, gehun aur kele mein nasein saath-saath chalti hain: parallel venation. Aam, peepal aur gudhal mein jaal banaati hain: jaal jaisi (reticulate) venation.

Ab dhyaan se ek ghaas-phoos ukhaado aur jadein dekho. Taproot mein ek moti mukhya jad aur patli side jadein (sarson, mooli). Fibrous jadein lagbhag ek jaisi patli jadon ka guchha (ghaas, gehun, pyaaz).

Scientists ne ek pattern dekha: parallel nason wale paudhon ki aksar fibrous jadein hoti hain, aur jaal nason wale ki aksar taproot. Unke beej bhi alag: bhiga chana do hisson mein toot-ta hai (do beej-patra, dicot); makke ka daana nahi (ek beej-patra, monocot).

Explore: paudhe sort karo.

  1. Har paudha herb, shrub ya tree hai?
  2. Ab patton ko nason se sort karo.

Yaad rakho

  • Herbs: naram hare tane. Shrubs: ghani, lakdi jaise tane. Trees: ek mota tana.
  • Parallel nasein ↔ fibrous jadein ↔ monocot beej. Jaal nasein ↔ taproot ↔ dicot beej.

Quick check

Ek paudhe ke patton mein parallel nasein hain. Iski jadein kaisi hongi?

  1. Fibrous jadein
  2. Taproot
  3. Koi jad nahi
  4. Patton par jadein
Answer

Fibrous jadein. Parallel nasein aksar fibrous jadon ke saath hoti hain, jaise ghaas aur gehun mein.

Socho

Gauri ko ek paudha milta hai jiske patton mein parallel nasein hain. Bina ukhaade, wo uski jadon aur beej ke baare mein kya andaaza laga sakti hai?

Ek answer

Iski jadein shaayad fibrous hongi, aur beej mein shaayad ek beej-patra hoga (monocot), jaise ghaas, gehun aur makka. Wo beej dekhkar jaanch sakti hai.

Practice

Teen levels (easy, medium, hard) ke naye sawaalon se practice karo, kuch hands-on, hints aur hal ke saath. Topic poora karne ke liye pichhle 5 mein se 4 sahi karo.