Give differences: Tracheids and Vessels
Tracheids | Vessels |
$(1)$ They are unicellular elements in gymnosperms. | $(1)$ They are multicellular element in angiosperms. |
$(2)$ It vertical wall is in the form of pore. | $(2)$ its verical wall completely breaks down gradually. |
$(3)$ Cells are narrow ended, long and cylindrical. | $(3)$ long cylindrical and tube like structure. |
$(4)$ Transport capacity is less. | $(4)$ Transport capacity is more. |
Identify the permanent tissues shown in the following figures
Aerenchyma is helpful in plants by
$A$ : Cells of sclerenchyma have thickened secondary walls.
$R$ : Cells have deposition of lignin.
Epidermis in stem is produced from
Chloroplast containing parenchyma is called