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Keep bread or chapati in a moist in place and observe the changes that occur in it daily and list them.In how many days its surface got covered with white filament-like structures and black spots? Observe these spots with the help of a magnifying glass-1. In how many days its surface got covered with white filament – like structures and black spots?2. Which type of structures do you see?3. Can you see these structures without a magnifying glass?4. What are these structures?5. Where did these structures come from?These structures are the filaments and spores of fungi. Spores of many micro-organisms remain suspended in air. In presence of favourable environment and nutrition, they grow and form filament-like structures. |
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Answer» 1. In two or three days. Observe these spots with the help of a magnifying glass. 2. Thin, white and black coloured patches are seen. 3. No, these structures are not seen without the magnifying glass. 4. These structures are the filaments and spores of fungi. 5. Spores of many micro-organisms remain suspended in air. In presence of favorable environment and nutrient, they grow and form filament – like structures. |
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