Question

Organisms that can prepare their own food.
a. Autotrophs
b. Heterotrophs
c. Phototrophs
d. None of the above

Answer 1

Hint: Green plants are chlorophyll containing organisms that can prepare their food by the process of photosynthesis. In the process of photosynthesis, light energy from the sunlight converts into chemical energy.

Complete answer:
The word auto means self and trophy means preparing, so the organisms that prepared their food are called autotrophs. These organisms prepared their food by using carbon dioxide, light, water and other chemicals.

Autotrophs are sometimes also called producers. Plants are the most known autotrophs apart from the green plants there are many different types of autotrophic organisms such as phytoplankton; these are tiny organisms found in the ocean, algae (large forms are known as seaweeds) live in water. Some of the bacteria are also autotrophs. Most of the autotrophic synthesised the food by the process of the photosynthesis, they use light energy from the sun to convert water and minerals from the soil and carbon dioxide from the air into glucose.

Glucose is the type of sugar that provides energy to the plants and they also use glucose to make the cellulose. The cellulose is the substances that are present in the cell wall and help to grow.

Heterotrophs are organisms that cannot prepare their food. Herbivore and other Heterotrophs eat autotrophs to get energy.

Hence, the correct answer is option (A).

Note: Some autotrophs undergo the chemosynthesis to prepare their food instead of photosynthesis. The autotrophs that prepare food by the chemosynthesis do not use energy from the sun rather it uses chemical reaction generally combining hydrogen sulphide or methane with oxygen to prepare food.