Velamen and spongy tissue is found in
Breathing roots
Parasitic roots
Tuberous roots
Epiphytic roots
The baloon like outgrowth of parenchyma in the lumen of a vessel is known as
In which of the following, there is no differentiation of bark, sapwood and heartwood?
Assume that a pencil box held in your hand, represents a plant cell. In how many possible planes can it be cut ? Indicate these cuts with the help of line drawings.
Histogen theory states that epidermis is derived from the