Question

In each of the following situations what happens to the rate of photosynthesis?
(a) Cloudy days
(b) No rainfall in the area
(c) Good manuring in the area
(d) Stomata get blocked due to dust

NCERT Class X
Science - Exemplar Problems

Chapter_Life Processes

Answer 1

Photosynthesis is a process of formation of "carbohydrates and oxygen" in plants with the help of carbon dioxide gas and water. The reaction occurs in the "sunlight and chlorophyll" presence in the leaves of plant.  

(a) In cloudy day, the sunlight will be less, hence, the rate of photosynthesis will decreases.

(b) If there is "no rainfall" in the area, then there will be no water. Hence, it will not be available for photosynthesis and leaves will also be dry, so there is less chlorophyll. Hence, photosynthesis rate will decrease.

(c) Manures provide nutrients to plants hence rate of photosynthesis will increase.

(d) Stomata helps to transfer $CO_2 \ and \ O_2$ gas for photosynthesis. Hence, due to blocked stomata, photosynthesis rate will decrease.

Answer 2

Answer:

with the hope that you understand it

THANK YOU