Plant transpiration takes place because:

• A. water evaporates from the stomata in the leaves
• B. chlorophyll absorbs sunlight for photosynthesis
• C. plants absorb carbon dioxide through their roots
• D. glucose is transported from leaves to roots

Answer: (A)

Verified step by step guidance

1. Understand the process of transpiration: Transpiration is the loss of water vapor from the aerial parts of a plant, primarily through small openings on the leaves called stomata.
2. Recognize the role of stomata: Stomata are tiny pores on the surface of leaves that allow for gas exchange (carbon dioxide in, oxygen out) and water vapor to escape during transpiration.
3. Identify the driving force of transpiration: Water evaporates from the mesophyll cells inside the leaf and exits through the stomata. This evaporation creates a negative pressure that pulls water upward from the roots through the xylem.
4. Eliminate incorrect options: Chlorophyll absorbing sunlight is related to photosynthesis, not transpiration. Plants absorb water and nutrients through their roots, not carbon dioxide. Glucose transport is part of the phloem's function, not related to water loss.
5. Conclude the correct answer: The primary reason for plant transpiration is the evaporation of water from the stomata in the leaves, which drives the movement of water through the plant.