OBJECTIVE LIFE SCIENCE
PLANT PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which structure is made of mature, living, fully functioning cells?
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vessel elements of xylem
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sieve tube cells of xylem
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tracheid cells of phloem
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companion cells of phloem
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Explanation:
Detailed explanation-1: -The phloem is composed of three types of cells – the conducting cells, the parenchyma cells and the supportive cells. The conducting cells, also called sieve elements, are composed of columns of sieve tube cells that have perforations in their lateral walls and that helps in the conduction of food throughout the plant.
Detailed explanation-2: -The phloem tissue consists of several types of cells, including sieve elements, companion cells, and phloem parenchyma cells.
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