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  4. An organised and differentiated cellular structure having cytoplasm but no nucleus is

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Q. An organised and differentiated cellular structure having cytoplasm but no nucleus is

AIPMTAIPMT 1991Anatomy of Flowering Plants

Solution:

An organised and differentiated cellular structure having cytoplasm but no nucleus are sieve tubes. The sieve tubes are living cells. Their walls are thicker than surrounding parenchyma cells. Sometimes they have a special, shinning nacreous thickening. Cytoplasm occurs in the form of thin lining enclosing a big central vacuole.