(IGP) GS Paper 1 - General Science - "Digestion In Plants"
Integrated Guidance Programme of General Studies for IAS (Pre) - 2013
Subject - General Science
Chapter : Digestion In Plants
Facts from NCERT
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The leaves have a green pigment called chlorophyll. It helps leaves to capture the energy of the sunlight.
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Besides leaves, photosynthesis also takes place in green stems and green branches. Desert plants have green stems which carry out photosynthesis.
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Algae are nitrogenous substance which contains nitrogen.
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A plant like cascuta (amarbell) does not have chlorophyll. It takes readymade food from the plant on which it is climbing. The plant on which it climbs is called a host. Since it deprives the host of valuable nutrients. It is called a parasite.
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Insectivorous plants:- these are insect eating plants. The insects is digested by the digestive juices secreted in the pitcher, the pitcher like structure is the modified part of the leaf.
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Fungi have a different mode of nutrition. They secrete digestive juices on the dead conert it into a solution. Then they absorb the nutrient from it. This mode is called saprotrophic nutrition. Plants which use saprotrophic mode of nutrition are called saprotrophs. Eg: A mushroom as a saprotrophs.
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