What is seive cell in phloem

1.	What is seive cell in phloem
Answer» \tSieve element was discovered by Hartig.\tSieve cells/sieve tube elements are living and thin walled.\tA matured seive cell/sieve tube element lack nucleus. Thus these are enucleated living cells.\tCentral vacuole is present in each sieve cells/sieve tube element. Cytoplasm of sieve cells/sieve tube element show cyclosis in the form of thin layer around the vacuole

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