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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.
उत्तर
-
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.
-
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.
संबंधित प्रश्न
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 |
What moves the food in the digestive organs?
Define nutrition.
What are the different modes of nutrition? Explain with one example of each mode of nutrition.
Describe the process of nutrition in Amoeba. Draw labelled diagrams to show the various steps in the nutrition in Amoeba.
Two of the following organisms have a holozoic mode of nutrition. These organisms are:
(a) Paramecium and Plasmodium
(b) Plasmodium and Parakeet
(c) Parakeet and Paramecium
(d) Paramecium and Parasite
In one of the following organisms, the gaseous exchange during respiration does not take place through cell membrane/skin. This organism is:
(a) Electric eel
(b) Leech
(c) Earthworm
(d) trachea
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) | Heterotrop |
| (c) | Pitcher plant | (iii) | Autotroph |
| (d) | Cuscuta | (iv) | Saprophyte |
| (e) | Elephant | (v) | Parasitic |
Can you give me a name?
Solve each of the following riddles by writing the name of the organism and its mode of nutrition. One riddle is solved to help you.
I live in water; people keep me in an aquarium and feed me. ______, ______
