Question

Insectivorous plants like Venus flytrap and pitcher plants are green plants that can photosynthesis. then why do they need to feed on insects?

Answer 1

To fulfil the requirement of nitrogen

Answer 2

Carnivorous plants are plants which get nutrients from trapping and eating animals. They are often called insectivorous plants, because they usually trap insects. Since they get some of their food from animals, carnivorous plants can grow in places where the soil is thin, or poor in nutrients.