AP BIOLOGY

PLANTS

TRANSPORT IN PLANTS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is a description of transpiration?
A
A exchange of gases between the leaf and the atmosphere
B
B loss of water vapour from the leaves and stems of a plant
C
C movement of water from the roots to the leaves
D
D movement of water through the cells of the leaf
Explanation: 

Detailed explanation-1: -It is generally the evaporation of water from the surface of the leaves. During the process of transpiration, water molecules in the plant tissues are removed from the aerial parts of the plants. Only a small amount of water absorbed by the plants is utilised in growth and development.

Detailed explanation-2: -Transpiration is a process that involves loss of water vapour through the stomata of plants. The loss of water vapour from the plant cools the plant down when the weather is very hot, and water from the stem and roots moves upwards or is ‘pulled’ into the leaves.

Detailed explanation-3: -Transpiration is defined as the physiological loss of water in the form of water vapor. It also evaporates from the surfaces of leaves, flowers, and stems. Transpiration has two main functions namely, cooling the plant and pumping water and minerals to the leaves for photosynthesis.

Detailed explanation-4: -Transpiration is defined as the evaporation of water from plants, especially leaves. It occurs through leaves and other parts of the plant. It happens through leaves while their stomata remains open for the passage of CO2 and O2 during photosynthesis. So, the answer is option C.

Detailed explanation-5: -The process by which plants remove excess water through stomata present on the surface of leaves is called ‘transpiration’. Transpiration is essentially evaporation of water from leaves of the plant.

There is 1 question to complete.