Natural Environment

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An ecosystem is a biological environment consisting of all organisms living in a particular area, along with the non-living physical components with which they interact. Examples: Terrestrial - grassl…

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Plants are called producers because they manufacture their own food through photosynthesis and provide food to all other organisms directly or indirectly. They occupy the first trophic level (primary …

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Algae → Small fish → Big fish → Water birds. Here algae are producers (1st trophic level), small fish are primary consumers (2nd level), big fish are secondary consumers (3rd level), and water birds a…

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Energy decreases because only 10% of energy is transferred to the next trophic level. The rest (90%) is lost as heat during metabolic processes like respiration, movement, and digestion. This is why f…

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Carbon dioxide released by animals is taken up by plants during photosynthesis to make food. It can also dissolve in water bodies or remain in the atmosphere. This continuous exchange forms the carbon…

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Bacteria convert atmospheric nitrogen into forms plants can use (nitrogen fixation) and break down dead matter to release nitrogen back. Two types: Rhizobium (fixes nitrogen in legume roots), Nitrosom…

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Desert plants have fewer stomata to reduce water loss through transpiration. Thick waxy leaves store water (succulent) and the waxy coating prevents water evaporation. These adaptations help survive i…

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Camel: Hump stores fat, can drink large amounts of water, concentrated urine, scaly heat-resistant skin. Polar bear: Thick fur traps air for insulation, fat layer under skin, round bulky body with sho…