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CLASS X - SCIENCE LIFE PROCESSES PRASHANT KIRAD (iii) The event that does not occur in photosynthesis is (a) Absorption of light energy by chlorophyll 7 b) Reduction of carbon dioxide to carbohydrates xidation of carbon to carbon dioxide «- Conversion of light energy to chemical energy. (iv) lodine solution gives blue-black colour with tarch (b) Proteins (c) Glucose (d) Fats. Test tube wait Lamina or Midrib Phloem Xylem Vascular bundle Waxy cuticle Air spaces Guard cell Remain fully open Remain mostly closed Open wider than usual Show no change Heterotrophic Nutrition ~ BATCH Neg) Heterotrophic nutrition ts the type of nutrition in which organisms cannot prepare their ownfoo. ) ——— They depend on other organisms for food, either directly or indirectly. For example, humans and animals depend on plants directly or indirectly for food. Holozoic Saprophytic Parasite Holozoic Nutrition e Holozoic nutrition is a type of heterotrophic nutrition in which organisms take in complex food material. ° This food is digested inside the ody with the help of enzymes. e The digested food is then absorbed and utilised by the body for energy, growth and repair. Examples: UZ Herbivores: Cow, goat, —_ Carnivores: Lion, tiger Omnivores: Human beings ~~ Unicellular organisms:\Amoeba,|Paramecium Saprophytic Nutrition Saprophytic nutrition is a type of heterotrophic nutrition in which organisms obtain food from dead and decaying organic matter. | — e These organisms secrete digestive enzymes outside their body. wea e The enzymes break down the complex food into simpler soluble substances. e These simpler substances are then absorbed by the organism. e Mushroo e Yeast a All of these are types of Fung) a plant parasite, Cuscuta a fungi, Rhizopus On animal parasite, Tapeworm @bacteria, Rhizobium Ingestion: is the process of taking food into the body. Digestion: is the process of breaking down complex food into simpler soluble substances with the help of digestive enzymes. Absorption: is the process by which digested food passes into the blood or body cells. Assimilation: is the process by which absorbed food is used by the body for energy, growth and repair. Egestion: Egestion is the process of removing undigested food from the body. | Nutrition in Amoeba & ~ and Paramecium | Ingestion: Food is taken in with the help of pseudopodia. Digestion: Food is digested inside the food vacuole by digestive enzymes. Absorption: Digested food is absorbed into the cytoplasm. Assimilation: Absorbed food is used for energy, growth and repair. Egestion: Undigested food is removed from the body surface. it Ingestion Pseudopodia ; Food Fr : - Undigested vacuole Ried. ite ae waste Food particle Paramecium is also a unicellular organism, that lives in water and moves and feeds using hair-like structures called cilia. e Ingestion: Cilia push food into the oral groove. Digestion: Food is digested inside the food vacuole. Absorption: Digested food is absorbed into the cytoplasm. Assimilation: Absorbed food is uSed by the cell. Egestion: Undigested food is expelled out. 
