AP BIOLOGY

Detailed explanation-1: -Xylem and Phloem are two different types of vascular tissues, which are mainly involved in the transportation process. These tissues form a vascular bundle and these work together as a unit. The movement of xylem is unidirectional, while the movement of phloem is bidirectional.

Detailed explanation-2: -So, the correct answer is ‘conjoint’

Detailed explanation-3: -A vascular bundle is a part of the transport system in vascular plants which is comprise of two tissues: xylem and phloem. Both the tissues conduct substances.

Detailed explanation-4: -The vascular bundles are arranged near the edge of the stem, with the phloem on the outside and the xylem on the inside.

Detailed explanation-5: -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.