Which of the following is not a primary function of a green leaf?

The primary functions of a green leaf include the manufacture of food through photosynthesis, the interchange of gases, and the evaporation of water via transpiration [3]. Leaves are often called 'food factories' because they use chlorophyll and sunlight to synthesize glucose [4]. Gaseous exchange occurs through tiny pores called stomata, which allow carbon dioxide to enter and oxygen to exit [1]. Transpiration involves the evaporation of water from leaf cells, creating a suction pull that helps move water from the roots [4]. While leaves contain vascular tissues like xylem and phloem, the actual conduction (transport) of food and water throughout the entire plant is the primary function of the stem and the specialized vascular system, not the leaf itself [5]. The leaf acts as the site of production and the starting or ending point for these materials, but the conduction process is a systemic function [5].

Sources

1. [1] Science-Class VII . NCERT(Revised ed 2025) > Chapter 10: Life Processes in Plants > In a Nutshell > p. 150
2. [2] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > Activity 5.8 > p. 95
3. [3] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > Activity 5.1 > p. 83
4. [4] Science-Class VII . NCERT(Revised ed 2025) > Chapter 10: Life Processes in Plants > 10.2.2 Role of air in the preparation of food > p. 144
5. [5] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > 5.4.2 Transportation in Plants > p. 94