HORTICULTURE SCIENCE
ULTRA STRUCTURE OF PLANT CELLS AND ORGANS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which cell does not have a cytoplasm at maturity
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Guard cells
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Xylem
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Sieve tube cells
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Companion cells
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Explanation:
Detailed explanation-1: -Sclerenchymatous cells get deposited by lignin and lose nucleus & cytoplasm at maturity. Xylem vessels consist of series of elongated dead cells for quick conduction of water and salts.
Detailed explanation-2: -Xylem cells are dead at maturity so they cannot perform photosynthesis. Sugars are transported by phloem (from the leaves to other areas of the plant).
Detailed explanation-3: -Xylem is a plant tissue that is complex and is responsible for water transport and nutrients to the plant. Xylem-type vessel cells can be either alive or dead. According to researchers and botanists, the elements of xylem tissue are dead except for the living parenchyma.
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