AP BIOLOGY

Detailed explanation-1: -Xylem and phloem are examples of vascular tissues. The function of vascular tissues is to conduct water and food different part of the plant body. Vascular tissues are complex permanent tissues because they are made of more than one cell type.

Detailed explanation-2: -Xylem is vascular tissue that transports water and dissolved minerals from roots to stems and leaves. This type of tissue consists of dead cells that lack end walls between adjacent cells. The side walls are thick and reinforced with lignin, which makes them stiff and water proof.

Detailed explanation-3: -Xylem and phloem are called vascular or conducting tissues because both xylem and phloem tissues transport materials in plants, they are together called vascular tissues.

Detailed explanation-4: -So, the correct answer is ‘conjoint’