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Questions and Answers
What is the primary role of chlorophyll in the process of photosynthesis?
What is the primary role of chlorophyll in the process of photosynthesis?
- Absorbing sunlight for the process to occur
- Producing oxygen as a by-product
- Creating sugars from carbon dioxide and water
- Storing solar energy in the form of food (correct)
What differentiates partial parasites from total parasites in terms of obtaining nourishment?
What differentiates partial parasites from total parasites in terms of obtaining nourishment?
- Partial parasites do not consume any nutrients from the host.
- Total parasites feed exclusively on decomposing matter.
- Partial parasites rely entirely on the host for nutrition.
- Total parasites get some sustenance from the host. (correct)
What characterizes saprophytic organisms in terms of their diet preferences?
What characterizes saprophytic organisms in terms of their diet preferences?
- They solely rely on sunlight for energy conversion.
- They feed on living plants and animals.
- They obtain nutrition from decomposing plant and animal matter. (correct)
- They extract minerals from the soil for nourishment.
How do insectivorous plants primarily obtain their nutrition?
How do insectivorous plants primarily obtain their nutrition?
What is the main objective of Class 7 Science Chapter 1 notes regarding nutrition in plants?
What is the main objective of Class 7 Science Chapter 1 notes regarding nutrition in plants?
How does symbiosis differ from parasitism in terms of the nutritional relationship between organisms?
How does symbiosis differ from parasitism in terms of the nutritional relationship between organisms?
What is the primary purpose of revision notes for Class 7 Science Chapter 1?
What is the primary purpose of revision notes for Class 7 Science Chapter 1?
How do green plants produce their own food?
How do green plants produce their own food?
What is the term for the process by which an organism consumes food and how the body processes it?
What is the term for the process by which an organism consumes food and how the body processes it?
What is the term for the components of food that give the body nutrition?
What is the term for the components of food that give the body nutrition?
What type of organisms are green plants?
What type of organisms are green plants?
What is the purpose of Maths NCERT Solutions Class 7?
What is the purpose of Maths NCERT Solutions Class 7?
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Study Notes
Nutrition in Plants
- Photosynthesis is the process by which green plants prepare their own food using chlorophyll, carbon dioxide, water, and sunlight.
- Chlorophyll is essential for photosynthesis to occur, and it helps store solar energy in the form of food in the leaves.
- During photosynthesis, plants produce complex chemical compounds such as sugars and oxygen.
- Oxygen is created during photosynthesis, which is essential for the survival of living species.
Types of Nutrition
- Autotrophic organisms, such as green plants, produce their own food through photosynthesis.
- Heterotrophic organisms, including plants and animals, rely on others for their nutrition.
- Saprotrophs, such as fungi, obtain their food from dead and decaying plant and animal matter.
- Parasitic plants, such as Cuscuta, obtain their food by feeding on another plant (host).
- Total parasites, like mistletoe, rely entirely on the host for nourishment, whereas partial parasites, like the painted cup, obtain some of their nutrients from the host.
Symbiotic Nutrition
- Symbiosis is a type of nutrition in which two or more individuals collaborate to meet their nutritional needs.
- An example of symbiosis is the relationship between algae and fungus, which forms lichens on tree trunks, where the fungus provides water to algae, and algae provide food to fungus.
Insectivorous Plants
- Insectivorous plants, such as pitcher plants, bladderworts, and Venus flytraps, obtain their nutrition from both the soil and small insects.
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