Which process in plants helps to regulate temperature?

• A. Photosynthesis
• B. Transpiration
• C. Respiration
• D. Fermentation

Answer: (B)

Transpiration is the process in plants that helps to regulate temperature by releasing water vapor from their leaves into the atmosphere. When water evaporates from the leaf surface, it cools the plant, similar to how sweat cools the human body. This cooling effect is crucial for maintaining optimal temperature and preventing overheating in plants, especially during hot conditions.

While photosynthesis is the process by which plants convert sunlight into energy, it does not directly manage temperature regulation. Respiration is a metabolic process that provides energy for plant growth and functions but does not influence temperature control the way transpiration does. Fermentation, which occurs in the absence of oxygen, is not a common process in higher plants and does not play a role in temperature regulation. Thus, transpiration is the primary process that aids plants in temperature management.