AP BIOLOGY

Detailed explanation-1: -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. The movement of synthesized foods from the leaves to other plant organs occurs chiefly through other vascular tissues in the stem called phloem.

Detailed explanation-2: -Xylem transports water, minerals, and nutrients from the soil to all the plant parts. There are two types of “transport” tissues in plants-xylem and phloem. Water and solutes are transported by the xylem from the roots to the leaves, and food is transported from the leaves to the rest of the plant by the phloem.

Detailed explanation-3: -The tube-like structure called xylem is present in the stem that carries water to all the parts of the plant. The water absorbed by the root is carried through the stem to all parts of the plant.

Detailed explanation-4: -Stems support the whole plant and help it to stand erect. It also helps in the transportation of food and water. At the same time, the function of leaves is to prepare food by the process called photosynthesis. Thus, it is not the leaf but it is the stem that holds the plant upright.

Detailed explanation-5: -The stem is the part of the plant responsible for conducting water. Within the stem, there is a structure called xylem which forms a network of tubes which carry water from the roots to all parts of the plant.