19. End walls of sieve tubes areperforated and are called Companion ce

1.	19. End walls of sieve tubes areperforated and are called Companion cellsFibres Sieve plates
Answer» Answer: The end walls of SIEVE tubes are perforated to FORM sieve plates. A mature sieve element has a peripheral cytoplasm and a LARGE vacuole but no nucleus. The nucleus of the companion CELL controls the function of sieve element. Companion CELLS: These are specialized parenchymatous cells. Step-by-step explanation: PLS MARK ME AS THE BRAINLIESTAND PLS FOLLOW ME

19. End walls of sieve tubes areperforated and are called Companion cellsFibres Sieve plates

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Answer:

The end walls of SIEVE tubes are perforated to FORM sieve plates. A mature sieve element has a peripheral cytoplasm and a LARGE vacuole but no nucleus. The nucleus of the companion CELL controls the function of sieve element. Companion CELLS: These are specialized parenchymatous cells.

Step-by-step explanation:

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19. End walls of sieve tubes areperforated and are called Companion cellsFibres Sieve plates​

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19. End walls of sieve tubes areperforated and are called Companion cellsFibres Sieve plates