Q23 of 163 Page 226

Give an example of a four step food chain operating in grassland. Name the secondary consumer in this food chain.

Example of a food chain operating in grassland

The secondary consumer is Frog in this food chain as it eats grasshopper which are primary consumers of grass.

What is the role of decomposers in the ecosystem?

What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.

Define trophic level. Draw the food chain with four trophic levels.

What will happen if we kill all the organisms in one trophic level?