CBSE Class Notes and Question Answers Online – Classnotes123
What is heterotrophic nutrition? It is the mode of nutrition in which an organism cannot make its own food from simple organic materials and depends on other organisms for its …
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Photosynthesis is the process by which green plants synthesize organic food as carbohydrates in the presence of sunlight, chlorophyll water, CO2 and some other raw materials. Oxygen is released in …
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What is Peristalsis and peristaltic movement? Peristalsis is involuntary contraction and relaxation of the muscles of the alimentary canal which contract rhythmically in order to push the food forward. This …
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Mode of Nutrition in Paramecium Paramecium is a tiny unicellular animal. It feeds on microorganisms like bacteria, algae and yeasts. Like amoeba, paramecium also exhibits holozoic nutrition which is a …
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Digestive glands are the glands which have ducts that secrete digestive substances necessary for digestion in the digestive tract. For example salivary glands, liver , pancreas Various glands associated with …
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Amoeba is a unicellular and omnivore organism. It eats plants and animals as food which floats in water in which it lives. The mode of nutrition in amoeba is holozoic. …
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Corrosion is the slow process of eating away of metals by the reaction of atmospheric air, moisture or a chemical (such as an acid). For example rusting of iron, tarnishing …
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Corrosion Corrosion is the type of Oxidation reaction in everyday life in which the open surface of the metals are slowly eaten away by the reaction of air, water and …
Read MoreQuestion 1. What is a globe? Answer 1. Globe is a simple and accurate model of the earth which shows distribution of land and water on the surface of the …
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Exchange of gases in plants The energy produced in plants by respiration is utilized in growth and life functions. The respiration in plants involves the exchange of Oxygen and carbon …
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