Hydrostereom or transfusion tissue is found in (1) Gymnosperm roofs (2) Gymnosperm leaves (3) Gymnosperm stems (4) All the above

Answer: (2)

Transfusion tissue or Hydrostereom for water and food conduction is found in Pinus and Cycas leaves or leaflets. Transfusion tissue is the tissue typical of the vascular bundles of Gymnosperm leaves and consists of all living cells, such as those of parenchyma with walls, not lignified and thin-walled but lignified tracheids with bordered pits.

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