(i) Mention two ways in which photosynthesis is useful to life.
(ii) Explain why respiration is said to be a reversal of photosynthesis?
(iii) What is the role of chlorophyll in green plant?

Open in App

Solution

(i) Photosynthesis is useful to life in the following ways:

All heterotrophs depend on plants for their energy requirements.

The by-product of photosynthesis, oxygen is the main factor responsible for the sustenance of life on the Earth.

(ii) Respiration is said to be reversal of photosynthesis. Oxygen is consumed and carbon dioxide is released in respiration, whereas oxygen is released and carbon dioxide is consumed in photosynthesis.

(iii) Chlorophyll is the green coloured pigment found in chloroplast that helps in the absorption of energy from sunlight. This energy is used in the formation of food from carbon dioxide and water in plants through the process of photosynthesis.

Suggest Corrections

Similar questions

Q. Explain why respiration is said to be the reverse of photosynthesis.

Q. (i) Define dark reaction.
(ii) Give an overall balanced equation of this process
(iii) Describe an experiment to prove that sunlight is necessary for photosynthesis.
(iv) Mention any two points in which photosynthesis and respiration in plants are opposite to each other.

(a)What is chlorophyll ? What part does chlorophyll play in photosynthesis ?
(b)(i) Which simple food is prepared first in the process of photosynthesis ?
(ii) Name the food which gets stored in plant leaves.

Select True or False in the following statements regarding photosynthesis and respiration.

1. Photosynthesis occurs only in the presence of chlorophyll.
2. Photosynthesis occurs at all time.
3. Respiration uses carbon dioxide and water.
4. In respiration carbon dioxide is released as end product.

Q. Answer the following:
(i) Give the overall chemical equation of photosynthesis in green plants.
(ii) Mention two significant advantages of photosynthesis to the living world as a whole.

Join BYJU'S Learning Program

(i) Mention two ways in which photosynthesis is useful to life. (ii) Explain why respiration is said to be a reversal of photosynthesis? (iii) What is the role of chlorophyll in green plant?

(i) Mention two ways in which photosynthesis is useful to life.
(ii) Explain why respiration is said to be a reversal of photosynthesis?
(iii) What is the role of chlorophyll in green plant?