Correct Option: C. for gaseous exchange Detailed Explanation: Lenticels are small openings or pores found on the stems and branches of woody plants. Their primary function is to facilitate gaseous exchange between the internal tissues of the plant and the external environment. Here’s a step-by-step breakdown of why option C is correct:

1. Structure of Lenticels: Lenticels are formed from loosely arranged cells that create a spongy structure. This structure allows gases to diffuse in and out of the plant. Unlike stomata, which are primarily found on leaves, lenticels are located on stems and are essential for the respiration of the plant.
2. Gaseous Exchange: Plants require oxygen for cellular respiration, a process that occurs in all living cells to produce energy. During the day, plants also produce oxygen through photosynthesis. Lenticels allow for the exchange of these gases (oxygen and carbon dioxide) directly with the atmosphere, which is crucial for the plant's metabolic processes.
3. Role in Respiration: In woody plants, especially during the winter or in conditions where stomata may be closed (like at night), lenticels provide an alternative pathway for gas exchange. This is particularly important for the survival of the plant, as it ensures that cells receive the oxygen they need and can expel carbon dioxide.
4. Adaptation: Lenticels are an adaptation to the plant's environment. In many cases, they are more prominent in plants that have thick bark, where traditional stomatal openings would be less effective due to the protective layers.

Why Other Options Are Incorrect:

• Option A: To remove excess water in plant: This option is incorrect because lenticels do not play a role in water removal. Instead, they are involved in gas exchange. Water regulation in plants is primarily managed through stomata and other structures, such as roots and specialized tissues.
• Option B: To absorb water from the atmosphere: While some plants can absorb moisture from the air through structures like trichomes or specialized roots, lenticels do not serve this function. Their role is specifically related to gas exchange, not water absorption.
• Option D: To absorb light: This option is also incorrect. Lenticels do not absorb light; that function is primarily carried out by chlorophyll in the leaves. Lenticels are not involved in photosynthesis or light absorption; they are focused on facilitating the movement of gases.

Summary of Key Points:

• Lenticels are small pores on the stems of woody plants that allow for gaseous exchange.
• Their primary function is to facilitate the exchange of oxygen and carbon dioxide, essential for plant respiration.
• They are an adaptation that helps plants survive in various environmental conditions, especially when stomata are not effective.
• Other options (A, B, D) do not accurately describe the function of lenticels, as they are not involved in water removal, water absorption, or light absorption.

This understanding of lenticels is crucial for grasping how plants interact with their environment and manage their physiological processes.