Food Chain
Food Chain
Food Chain: For an ecosystem to work there has to be a flow of energy within it. The organisms of the ecosystem need energy in the form of food. The ultimate source of this energy is the sun. A series of organisms through which food energy flows in an ecosystem is called a food chain. It may also be defined as follows. A food chain in an ecosystem is a series of organisms in which each organism feeds on the one below it in the series.
In a forest ecosystem, grass is eaten by a deer, which in turn is eaten by a tiger. The grass, deer and tiger form a food chain. In this food chain, energy flows from the grass (producer) to the deer (primary consumer) to the tiger (secondary consumer).
In a freshwater aquatic ecosystem like a pond, the organisms in the food chain include algae, small animals, insects and their larvae, small fish, big fish and a fish-eating bird or animal. A food chain always begins with producers. Herbivores (plant-eaters) come next in the chain. They are consumed by carnivores (flesh-eaters). A few food chains can be long and may extend to the fourth, fifth or even sixth order of consumers.
Characteristics of food chain
Out of the following, which is a linear arrangement of organisms ? | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following constitutes a correct food chain? | |||
| Right Option : B | |||
| View Explanation |
A food chain will not begin in the absence of ____________________ | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [10]
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Cheshta
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