Question

some plants are called parasites give reason

Answer 1

Some plants are parasites. That is, they do not make food on their own but get water, minerals and food from other plants. Parasitic plants may or may not have chlorophyll. Plants like the mistletoe have green leaves and make some of their own food and take only water and minerals from the host plant through specially developed roots, which secure the parasite to the host and grow into the host’s stem.

Answer 2

Some plants are parasites to fulfill their nitrogen requirements.