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प्रश्न
Answer the following question.
We observe that land becomes barren soon after monsoon. But in the next monsoon it flourishes again with varieties we observed in season earlier. How you think it takes place?
उत्तर
- After monsoon, plants like mosses (bryophytes), ferns (pteridophytes), small herbaceous plants, etc become dry, due to which land becomes barren.
- However, spores of bryophytes, pteridophytes, and seeds of herbaceous plants, grass remain in a barren land.
- During next monsoon, these spores and seeds germinate due to availability of water and other favourable conditions.
- Bryophytes and pteridophytes require water for reproduction. Hence they flourish during the monsoon season.
- Along with bryophytes and pteridophytes varieties of higher plants like grasses, some seasonal herbs or shrubs grow on barren land during monsoon due to favourable conditions.
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| 1. Stored food | Starch | ||
| 2. Cell Wall | Cellulose and algin | ||
| 3. Major pigments | Chl- a, d and Phycoerythrin |
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