AP BIOLOGY

PLANTS

PLANT TISSUE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Vessel Elements
A
Are the second water conducting plant cells and can be identified by their wide cells with less tapered ends.
B
Is a plant tissue located between the xylem and phloem and is the source of both the secondary xylem growth and the secondary phloem growth.
Explanation: 

Detailed explanation-1: -Vessels and Tracheids-Similarities The complicated xylem tissue is made up of tracheids and vessels. Both aid in water conduction down the stem and provide mechanical support for the plant. Both cells have tubular structures. In both cells, secondary lignification is evident.

Detailed explanation-2: -Both tracheids and vessel elements are long hollow cells with tapered end walls. The end walls of adjacent tracheids contain paired small, rimmed, nonperforated pores, called bordered pits; water diffuses through a shared central membrane.

Detailed explanation-3: -Vessel elements are the building blocks of vessels, which constitute the major part of the water transporting system in those plants in which they occur. Vessels form an efficient system for transporting water (including necessary minerals) from the root to the leaves and other parts of the plant.

Detailed explanation-4: -Xylem vessel elements have thick secondary cell walls (SCWs), which are composed of cellulose, hemicellulose, and lignin (Turner et al.

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