AP BIOLOGY

Detailed explanation-1: -Photosynthesis is not a primary function of stem. The process by which leaves prepare their food in the presence of sunlight by using water and carbon dioxide is called photosynthesis.

Detailed explanation-2: -(i) It supports branches, leaves, flowers, and fruits. (ii) It transports water and minerals from the roots to the leaves and other parts of plants. (iii) It transports food from leaves to different parts of the plant. (iv) It holds the plant upright.

Detailed explanation-3: -Stem absorbs water and minerals from the soil.

Detailed explanation-4: -The stem conducts water and nutrient minerals from their site of absorption in the roots to the leaves by means of certain vascular tissues in the xylem.