The cross-section of a plant material showed the following features when viewed under the microscope.
(a) The vascular bundles were radially arranged.
(b) Four xylem strands with exarch condition of protoxylem. To which organ should it be assigned?
Distinguish between softwood and hardwood is as
Softwood | Hardwood |
---|---|
Gymnospermic wood is soft wood It chiefly contains trachieds Vessels are absent. |
Angiospermic wood is hard wood It chiefly contain both trachieds and vessels Trachieds are absent. |
The pulpy part of fruit of peach and pear, the stone cells are present, which are an sclerenchymatous cells and which are dead in nature. Their function is to give mechanical support to the soft tissue.
Below is a list of plant fibres. From which part of the plant these are obtained
(a) coir (b) hemp (c) cotton (d) jute
(a) Coir It is a natural fibre obtained from husk of coconut. It is the fibrous mesoderm of the coconut fruit Cocos nucifera.
(b) Hemp The fibre is obtained from the stems of Cannabis sativa. It is the bast fibre (soft or stem fibre) obtained from secondary phloem.
(c) Cotton The fibre is the epidermal growth of cotton (Gossypium hirsutum) seed. It is elongated structure made up of cellulose.
(d) Jute It is a natural bast fibre obtained from Corchorus capsularis and made up of cellulose and lignin.