Podcast
Questions and Answers
Which organisms are classified as heterotrophs?
Which organisms are classified as heterotrophs?
What is the primary mode of nutrition for green plants?
What is the primary mode of nutrition for green plants?
Which plants take food from host plants?
Which plants take food from host plants?
What are the essential requirements for photosynthesis in plants?
What are the essential requirements for photosynthesis in plants?
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Which type of plants produce simple chemical substances like carbohydrates through photosynthesis?
Which type of plants produce simple chemical substances like carbohydrates through photosynthesis?
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In what way do insectivorous plants obtain their nutrition?
In what way do insectivorous plants obtain their nutrition?
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Which of the following is a characteristic of all animals?
Which of the following is a characteristic of all animals?
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'Solar energy is absorbed by the chlorophylls present in leaves/plants.' What process does this statement describe?
'Solar energy is absorbed by the chlorophylls present in leaves/plants.' What process does this statement describe?
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'Plants like Cuscuta are parasites.' Based on this information, what is the nutrition mode of Cuscuta?
'Plants like Cuscuta are parasites.' Based on this information, what is the nutrition mode of Cuscuta?
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'They can reduce the use of nitrogenous fertiliser where leguminous plants are grown.' Why can farmers reduce the use of nitrogenous fertilizers for leguminous plants?
'They can reduce the use of nitrogenous fertiliser where leguminous plants are grown.' Why can farmers reduce the use of nitrogenous fertilizers for leguminous plants?
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Study Notes
Modes of Nutrition
- Plants like Cuscuta (Amarbel) use heterotrophic mode of nutrition, relying on readymade food from other plants (hosts) as they lack chlorophyll.
- Insectivorous plants, like the pitcher plant, obtain nutrients by digesting insects that enter their structures.
- Saprotrophic nutrition involves absorbing nutrients from dead and decaying matter, exhibited by organisms like fungi.
Fungi
- Fungi can grow on various substrates, including pickles, leather, clothes, and other articles, especially in hot and humid weather.
- Fungal spores are present in the air and can germinate on wet and warm surfaces.
- Fungi can cause diseases in plants, animals, and humans, but some species, like yeast and mushrooms, are useful.
- Some fungi are used as medicines.
Symbiotic Relationships
- Symbiosis involves organisms living together and sharing shelter and nutrients.
- An example of symbiosis is certain fungi living inside the roots of plants, providing mutual benefits.
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Description
Explore the concept of plant nutrition and the unique case of Cuscuta (Amarbel) which relies on a host plant for its nutrition. Identify the characteristics and behavior of Cuscuta and understand its mode of obtaining food.
