Question

If some plants do not have chloroplast then what they have in the place of chloroplast?

Answer 1

Chlorophyll present in the chloroplasts of plant cells is essential for absorbing sunlight required for photosynthesis
that depends on different plants

For exaple
In cactus plants, the leaves are modified into spines to prevent the loss of water due to transpiration. The stems are green and perform photosynthesis.
So different plants which do not have chloroplast have some unique part to perform photosynthesis