Stele without pith is

A cross section of a plant material shows four xylem patches alternating with same number of phloem patches and in the xylem protoxylem is pointed towards periphery. In the centre of stele a small pith is present. The plant material is

A cross section of a plant material shows four xylem patches alternating with same number of phloem patches and in the xylem protoxylem is pointed towards periphery. In the centre of stele a small pith is present. The plant material is

Stele with star shaped xylem is

Star shaped stele devoid of pith termed as

Assertion : Young root contain s pith whereas i n old root pith is absent. Reason : Pith is soft and spongy Young root contains pith but as the tree matures it spith transforms into other cells.

Assertion. Protostele is the simplest stele Reason. Dictyostele is th most advanced type of stele

Assertion. Protostele is the simplest stele Reason. Dictyostele is th most advanced type of stele