How does a pitcher plant trap insects?

Solution:

Insectivorous plants usually grow in nutrient-deficient soil, so to meet the nutrient requirements of their body they trap insects. For example- pitcher plant.

The leaves of the pitcher plant is modified in such a way that the insects get attracted to them. The attraction could be due to color, fragrance or nectar. It has a lid on its top to close the opening after the entry of the insect. Once the insect is trapped the plant secretes juices into the insect's body which digest the insect body and the plant absorbs nutrients.  
 

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