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CBSE Class 7 Science Chapter 10 Nutrition in Plants Worksheet - Free Download

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FAQs on CBSE Class 7 Science Chapter 10 Nutrition in Plants Worksheet - Free Download

1. What is the process of photosynthesis in plants?
Ans.Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy stored in glucose. During this process, plants take in carbon dioxide from the air and water from the soil, and using sunlight, they transform these into glucose and oxygen. The overall equation for photosynthesis can be summarized as: 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂.
2. Why do plants need nutrients, and what are the main types?
Ans.Plants need nutrients to grow, reproduce, and carry out essential functions. The main types of nutrients are macronutrients, which include nitrogen, phosphorus, and potassium, and micronutrients, such as iron, manganese, and zinc. Macronutrients are required in larger quantities and are vital for processes like photosynthesis and cell division, while micronutrients are needed in smaller amounts but are equally important for plant health.
3. How do different environmental factors affect plant nutrition?
Ans.Environmental factors such as soil quality, water availability, light intensity, and temperature profoundly affect plant nutrition. For example, poor soil quality can lead to nutrient deficiencies, while insufficient water can hinder nutrient uptake. Additionally, adequate light is crucial for photosynthesis, and extreme temperatures can stress plants, impacting their ability to absorb and utilize nutrients effectively.
4. What role do soil microorganisms play in plant nutrition?
Ans.Soil microorganisms, including bacteria and fungi, play a crucial role in plant nutrition by breaking down organic matter and facilitating nutrient availability. They help decompose dead plants and animals, releasing nutrients back into the soil. Some microorganisms also form symbiotic relationships with plants, such as mycorrhizal fungi, which enhance nutrient uptake, especially phosphorus.
5. How can nutrient deficiencies in plants be identified and corrected?
Ans.Nutrient deficiencies in plants can be identified through visible symptoms such as yellowing leaves, stunted growth, or poor fruit development. Each nutrient deficiency has specific signs; for example, nitrogen deficiency often leads to yellowing of older leaves. To correct these deficiencies, gardeners can apply fertilizers that supply the lacking nutrients, adjust soil pH, or improve overall soil health through organic amendments.
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