With the help of a line diagram, show a simple food chain in a grassland.
Food chain:
Grass-------->grasshopper-------->frog-------->snake-------->eagle
Describe, with the help of a diagram, the different stages of a food chain.
What is meant by food web? Explain with the help of a simple diagram.
(a) What is a food chain? Give one example of a simple food chain.
(b) What is a 'food web'? Show its formation.