Answer:
The commerica! cork is
obtained from the cork tissue of Quercussuber, which yields bottlecork. Cork is
formed by cork cambium or phellogen cell. Cork cambium cells divide periclinally
, cutting cells towards the inside and outside. The cells cut off twowards
theoutside become suberised and dead.
These are compactly
packed in radial rows without intercellullar spaces and form cork of phellem.
Cork is impervious to water due to suberin and provides protection to
theunderlying tissues.
(a) CoirIt
is a natural fibre obtained from husk of coconut. It is the fibrous mesoderm of
the coconut fruit Cocosnucifera.
(b) Hemp The
fibre is obtained from the stems of Cannabis sativa. It is the bast fibre (soft
orstem fibre) obtained from secondary phloem.
(c) Cotton
The fibre is the epidermal growth of cotton (Gossypiumhirsutum) seed. It is
elongated structure made up of cellulose.
(d) Jute It
is a natural bast fibre obtained from Corchoruscapsularis and made up
ofcellulose and lignin.
You need to login to perform this action.
You will be redirected in
3 sec