SSC MTS EXAM

Detailed explanation-1: -phloem, plant vascular tissue that conducts foods made in the leaves during photosynthesis to all other parts of the plant. Phloem is composed of various specialized cells called sieve elements, phloem fibres, and phloem parenchyma cells.

Detailed explanation-2: -Sieve tubes, found in angiosperms, are living cells that are associated with companion cells. The association with companion cells helps in distant transportation within the plant cells. The sieve tubes are made up of longitudinal arrangement of sieve tube members from end to end.

Detailed explanation-3: -The phloem fiber is made up of sclerenchymatous cells these are lignified and lack nucleus thus nucleated cells of phloem are sieve tube elements in association with companion cells and phloem parenchyma.