Question

Green plants are known as ______________.

Answer 1

Hint: Some organisms can make their own food using natural resources like plants as they contains green pigment chlorophyll. It traps the sunlight and the energy of sunlight is used for making food material like glucose and starch. These organisms are called as autotrophs. Example all green plants and blue green algae (also called cyanobacteria).

Complete answer:
Green plants are known as autotrophs or autotrophic plants because green plants contain a green coloured photosynthetic pigment. It is called chlorophyll. It is found in the chloroplast present inside the mesophyll cells in the leaves of plants. It imparts the green colour to almost all plants. It acts like an antenna to catch the sunlight and trap the energy of sunlight. This energy is used for the photolysis of water to produce Hydrogen ions and free electrons, which contain high energy.
Later on, they produce reducing power (NADPH) and energy currency (ATP). During light independent reaction, this reducing power (NADPH) and energy currency (ATP) is used for the reduction of carbon dioxide into sugars like glucose. It is later on getting converted into starch that can be stored as food.

Note: there are some organisms that cannot synthesize their food by their own self and they are dependent on others for their food. Such organisms are called heterotrophs or heterotrophic organisms. Examples of heterotrophic organisms are all animals, fungi and most of the bacteria. They take their food from host organisms or from dead decaying matter (fungi). These may also cause harm to host organisms.