Question

Wilting of plants results from excessive?
A. Respiration
B. Photosynthesis
C. Absorption
D. Transpiration

Answer 1

Hint: Plants absorb water and other essential minerals through roots in order to fulfil the requirements of its tissues and other organs for normal metabolism. Meanwhile, plants also lose water in the form of vapours in response to certain stimuli.

Complete answer:
Respiration is defined as a process through which exchange of gases takes place. In plants, the carbon dioxide moves into the leaves of plants from the surroundings, whereas oxygen moves out of the plant.
Photosynthesis is that natural process adopted by plants to synthesize their own food with utilization of the carbon dioxide and water in presence of sunlight as well as chlorophyll. The site of photosynthesis is leaves, and other green parts of the plant. A carbohydrate is synthesized along with oxygen, which is a by-product of the reaction occurring during photosynthesis.
Absorption is the process of uptake of water and other nutrients from the soil. These are then transported to various plant parts after their absorption by the means of roots.
Transpiration is defined as the natural phenomenon adopted by plants through which loss of water takes place. Higher the transpiration, greater will be the rate of water absorption from the soil. In case the soil has less water availability for the plant, excessive water loss may cause the leaf cells to lose turgidity. This further results in dropping of leaves along with other soft parts of the plant, and therefore, it is commonly known as wilting.

The correct answer is option D, stating “transpiration”.

Note:
Under normal conditions in plants, the rate at which water is absorbed becomes equivalent to the rate at which the water loss occurs. Transpiration is an important factor that plays a significant role in absorption of water by the plant through its roots.