Assertion : Less than 1% of the water reaching the leaves is used in photosynthesis and plant growth.
Reason: Most of the water is lost through the stomata in leaves by transpiration
if both A and R are true and R is the correct explanation of A
if both A and R are true but R is not the correct explanation of A
if A is true but R is false
if both A and R are false.
Assertion: Less water content in soil decreases transpiration in plants.
Reason: Dehydration leads to closure of stomata on the surface of leaves.
Which of the following statement is correct : 1. At night, these guard cells swell with water and become bloated, opening the stoma. 2. During the day, the guard cells release their water and the stomata close. 3. More than 97% percent of water reaching the leaves is used in plant growth and photosynthesis. 4. The rate of transpiration can be easily demonstrated by cobalt chloride paper test.