Fill in the blanks:
(a) Green plants are called ______ since they synthesize their own food.
(b) The food synthesized by plants is stored as ______.
(c) In photosynthesis, solar energy is absorbed by the pigment called _______.
(d) During photosynthesis, plants take in _______ and release _______ gas.

(a) Green plants are called autotrophs since they synthesise their own food.

(b) The food synthesised by plants is stored as starch.

(c) In photosynthesis solar energy is absorbed by the pigment called chlorophyll.

(d) During photosynthesis, plants take in oxygen and release carbon dioxide gas.


Photosynthesis is a process by which plants make their own food in the presence of sunlight, carbon dioxide, water, minerals, and chlorophyll present in leaves.

Carbon Dioxide + Water + Sunlight ------>       Glucose    +       Oxygen
1) Plants take up carbon dioxide from the atmosphere through the tiny pores known as stomata present on the surface of the leaves.
2) Plants absorb the water and minerals from the soil with the help of roots and transport them to the leaves of the plant where the synthesis of food takes place.
3) The green pigment, chlorophyll present in plant leaves, helps the leaves to capture sunlight. Sunlight is the source of energy to carry out photosynthesis.
4) In the presence of sunlight, chlorophyll acts on carbon dioxide, minerals, and water to produce carbohydrates. These carbohydrates are stored in the plant leaves in the form of energy.
5) The process of photosynthesis also releases oxygen into the atmosphere.

The reaction of photosynthesis process is commonly written as:

      6CO    +              6H2O            SunLight   ---->     C6H12O6         +    6O2
Carbon dioxide         Water       Chlorophyll           Carbohydrates      Oxygen

During the process of photosynthesis, six carbon dioxide molecules (reactant) and six water molecules (reactant), are converted into one sugar molecule (carbohydrate) (product) and six oxygen molecules (byproduct) in the presence of light energy (sunlight) captured by chlorophyll.


Simply Easy Learning

Updated on: 09-Jan-2023


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