Question

what are insectivorous plants?

Answer 1

INSECTIVOROUS PLANT:
A plant that captures and digests insects either passively (as the common pitcher plant or the sundew) or by the movement of certain organs (as the Venus's-flytrap) — compare droseraceae, lentibulariaceae, sarraceniaceae

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Answer 2

Some plants eat insects. Such plants are called insectivorous plants. They trap and digest the insects. Pitcher plant is the example of an insectivorous plant. In pitcher plant the leaf is modified to form a pitcher like structure. The bright colour of the pitcher makes it very attractive to insects. Inside the pitcher; there are several hair-like structures. These hairs direct the trapped insects downwards. When an insect sits on the pitcher of the plant, the lid closes and the insect gets trapped inside the pitcher. The insect is then digested by the enzymes secreted by the cells of the plants.

Venus flytrap, utricularia, drosera and Rafflesia are the other examples of insectivorous plants.