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. |
How many type of cells constitute a simple permanent tissue
Both from phyllogenetic and ontogenetic point of view, which tissue is regarded as most primitive
In pteridophyta and gymnosperms which cells are present in place of companion cell
Identify figure :
Collenchyma differs from parenchyma in having