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Distinguish between Grazing food chain and detritus food chain.
Construct a pyramid of numbers by taking suitable examples for each trophic level in an ecosystem.
The energy enters the ecosystem through ______.
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Energy enters in a food chain through
State two advantages and two limitations of Hydel Power.
Which of the following statements about food chain and energy flow through ecosystem is false?
Arrange the following statement in the correct sequence and form a food chain:
Grasshopper → Frog → Grass → Crow.
Apart from plants and animals, microbes form a permanent biotic component in an ecosystem. While plants have been referred to as autotrophs and animals as heterotrophs, what are microbes referred to as? How do the microbes fulfil their energy requirements?
Complete the given chart:
| Trophic levels | Type of organisms | Status | Example |
| ______ | ______ | Secondary consumer | ______ |
| Second trophic level | Herbivore, Heterotrophs | _____ | ______ |
| ______ | ______ | ______ | Phytoplankton, grass, trees |
