Question

2. Why do insectivorous plants need to feed on insects when they can synthesise their food?
3. How does a soil become rich in nitrates when leguminous plants are grown in it?​

Answer 1

Answer:-

1. Insectivorous plants need to feed on insects due to the lack of nitrogen salts in the soil they grow in. To fulfill the need of nitrogen, insectivorous plants feed on insects.

2. Leguminous plants share a symbiotic relationship with a bacterium called ‘rhizobium.’ This rhizobium resides in the root nodules of the plant. It actually converts atmospheric nitrogen into nitrogenous compounds and fixes them in soil. This makes the soil more fertile.

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