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प्रश्न
Visit a green house if there is one near your place. Observe how they grow plants. Find out how they regulate the amount of light, water and carbon dioxide to grow the plants.
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उत्तर
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Light Regulation:
- Use of Shading Nets: To control the amount of sunlight entering the greenhouse.
- Artificial Lighting: Additional lights may be used to ensure plants receive adequate light during low natural light conditions.
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Water Regulation:
- Drip Irrigation Systems: Efficiently delivers water directly to the plant roots.
- Sprinkler Systems: Evenly distributes water over the plants.
- Humidity Control: Humidifiers or misters may be used to maintain the desired humidity levels.
-
Carbon Dioxide Regulation:
- Ventilation Systems: Ensures proper air circulation and CO2 levels.
- CO2 Enrichment: Some greenhouses use CO2 generators to increase the carbon dioxide concentration to enhance plant growth.
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संबंधित प्रश्न
Why do organisms need to take food?
Match the items given in Column I with those in Column II:
| Column I | Column II |
| Chlorophyll | Bacteria |
| Nitrogen | Heterotrophs |
| Amarbel | Pitcher plant |
| Animals | Leaf |
| Insects | Parasite |
Define parasitic nutrition.
What are the different modes of nutrition? Explain with one example of each mode of nutrition.
Name the mode of nutrition in roundworm.
Name the mode of nutrition in Plasmodium.
| There are four organisms A, B, C and D. The organism A eats only the flesh of other animals as food. The organism B can eat grains, fruits and vegetables as well as meat and fish. The organism C can make the food itself from simple inorganic substances present in the environment by utilising sunlight energy. On the other hand, organism D eats only plants and their products as food. |
- Which organism is (i) omnivore (ii) herbivore, and (ii) carnivore?
- Which organism is an autotroph?
- Which organism is/are heterotroph(s)?
- Which organism can be a producer?
- Which organism is/are consumer (s)?
- Give one example each of organisms which could be like (i) A, (ii) B, (iii) C, and (iv) D
| The organisms A, B and C can obtain their food in three different ways. Organism A derives its food from the body of another living organism which is called its D, without killing it. The organism B takes in the solid food by the process of ingestion, digests a part of this food and throws out undigested food in the process called E. The organism C obtains its food from dead and decaying plants. |
- What is the mode of nutrition of (i) organism A (ii) organism B, and (iii) organism C?
- What is the organism like D called?
- Name the process E.
- Give one example each of organisms like (i) A (ii) B, and (iii) C.
- What is the general name of three modes of nutrition exhibited by organisms A, B and C?
List two differences between 'Holozoic nutrition' and 'Saprophytic nutrition'. Give two examples of each of these two types of nutrition.
Match the organisms given in Column I with their mode of nutrition given in Column II.
| Column 1 | Column II | ||
| (a) | Mango tree | (i) | Insectivorous plant |
| (b) | Mushroom | (ii) | Heterotroph |
| (c) | Pitcher plant | (iii) | Autotroph |
| (d) | Cuscuta | (iv) | Saprophyte |
| (e) | Elephant | (v) | Parasitic |
