Question

Why do insectivores plants depend on insects when they can synthesis their own food

Answer 1

so they eat insects. Pitcher plants are called carnivorous plants because they feed on animal life ( Carnivorous plant), like other green plants, pitcher plants make their own food by a process called photosynthesis .Pitcher plants live in places where they get little nitrogen from the soil

Answer 2

Insectivores plants like Pitcher Plant carries out photosynthesis but then also they depends on plants bcoz...
It traps and eats insects to meet its requirements for certain nutrients that are not present in the environment where it grows.. :)