Major function of cortex is?

• A) Conduction of water
• B) Storage of water
• C) Storage of food
• D) Strength

The major function of the cortex in plants is primarily related to storage, specifically the storage of food. Therefore, the correct answer to your question is C) Storage of food. Let’s delve deeper into the role of the cortex and how it contributes to the overall function of a plant.

Understanding the Cortex in Plants

The cortex is a layer of tissue found between the outer epidermis and the inner vascular tissues in roots and stems. It plays several important roles in plant physiology, but its primary function revolves around storage.

Storage of Food

One of the main roles of the cortex is to store carbohydrates and other nutrients. In many plants, especially those that undergo photosynthesis, the cortex can store starch, which is a polysaccharide made up of glucose units. This stored energy can be utilized by the plant during periods of low photosynthetic activity, such as at night or during the winter months when sunlight is scarce.

Additional Functions of the Cortex

• Transport: The cortex can also facilitate the movement of water and nutrients from the soil to the vascular tissues, although this is not its primary function.
• Support: In some plants, the cortex provides structural support, helping to maintain the integrity of the plant as it grows.
• Protection: The outer layers of the cortex can serve as a barrier against pathogens and physical damage.

Examples of Cortex Functionality

To illustrate the storage function, consider a potato, which is a modified stem. The cortex of the potato tuber stores starch, allowing the plant to survive adverse conditions. When the plant needs energy, it can convert this stored starch back into glucose for growth and development.

In contrast, if we look at a plant like a cactus, the cortex may also store water, but this is more of a secondary function. The primary role remains food storage, particularly in non-succulent plants.

Conclusion on Cortex Functions

In summary, while the cortex has multiple roles, its major function is the storage of food, making it essential for the plant's energy management and overall health. Understanding these functions helps us appreciate how plants adapt to their environments and manage their resources effectively.