Give differences: Collenchyma and Sclerenchyma
Collenchyma | Sclerenchyma |
$(1)$ It is found in lower layer of epidermis in dicot plants. |
$(1)$It is seen in pericycle of dicot stem of monocot and hypodermis |
$(2)$ Cells are living and nucleated. | $(2)$cellas are dead. |
$(3)$Angles are made up of thickened cells. | $(3)$Cell wall is thickened with lignin and of long, narrow, thin cells. |
$(4)$Cells are oval, spherical or polygonal. | $(4)$Cells are polygonal and like long fibres. (Sclerenchymatic fibres). |
$(5)$ It gives flexibility. | $(5)$ It gives mechanical strength. |
Lignification is associated with
In a vascular bundle, if xylem vessels develop in a centripetal fashion, the xylem is likely to be
A fibre derived from a tracheid is
$I.$ Phloem transports the food materials usually from the leaves to other parts of the plant
$II.$ Phloem in the angiosperm is composed of sieve tube elements, companion cells, phloem parenchyma and phloem fibres
Identify which of the following statement is correct and select the correct option
Conjuctive tissue is made up of