Consider the following main functions of plants :

A. To produce and store food

B. To give strength and support to the plant

C. To transport water and minerals from roots to other parts of plant

The main function(s) of the stem is/are :

Correct Answer: Only B and C

Let us analyze each of the main functions of plants listed in the question to determine the primary roles played by the stem:

Analysis of Statements:

A. To produce and store food: This is primarily the main function of the leaves (via photosynthesis) and specialized storage organs (such as underground roots or tubers). While some green stems can carry out limited photosynthesis or store water/food, producing and storing food is generally not considered the main function of the stem for most plants.

B. To give strength and support to the plant: The stem acts as the structural axis of the plant, holding up the leaves, flowers, and fruits, enabling them to receive adequate sunlight and air. Thus, giving strength and support is a main function of the stem.

C. To transport water and minerals from roots to other parts of plant: The stem contains specialized vascular tissues, namely the xylem (which conducts water and dissolved minerals upwards from the roots to the rest of the plant) and phloem (which transports food/sugars from the leaves). Therefore, transportation of water and minerals is a fundamental main function of the stem.

Conclusion:

Since statements B and C describe the primary functions of the stem, the correct option is Only B and C.