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Fungi : Nutrition Video Lecture - NEET

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1. What is the main source of nutrition for fungi?
Ans. Fungi obtain their nutrition by absorbing organic matter from their surroundings. They are heterotrophic organisms, meaning they cannot produce their own food through photosynthesis like plants. Instead, they decompose dead organic material or live as parasites on other organisms to obtain nutrients.
2. Can fungi perform photosynthesis?
Ans. No, fungi cannot perform photosynthesis. Unlike plants, they lack chlorophyll, which is essential for photosynthesis. Instead, fungi obtain their energy by breaking down organic matter through the process of decomposition or by living as parasites on other organisms.
3. How do fungi obtain nutrients from their environment?
Ans. Fungi obtain nutrients by secreting enzymes that break down complex organic compounds into simpler molecules. These enzymes are then absorbed by the fungi, allowing them to obtain the necessary nutrients. This process is known as extracellular digestion and is a key characteristic of fungi's nutritional strategy.
4. Can fungi obtain nutrition from inorganic sources?
Ans. While fungi primarily obtain nutrition from organic sources, some species are capable of obtaining nutrients from inorganic sources as well. For example, certain fungi can form mutualistic relationships with plants, where they help in the absorption of nutrients from the soil. In this process, the fungi obtain carbohydrates from the plants while providing them with essential minerals.
5. How do fungi contribute to nutrient cycling in ecosystems?
Ans. Fungi play a crucial role in nutrient cycling within ecosystems. They are efficient decomposers, breaking down dead organic matter and releasing nutrients back into the environment. This process allows other organisms to utilize these nutrients, promoting the overall health and balance of the ecosystem. Additionally, fungi form symbiotic relationships with plants, helping them acquire essential nutrients from the soil, further contributing to nutrient cycling.
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