45. Fill in the blanks :
(a) Cork cells possesses on their walls that makes it impervious to gases and water.
(b) have tubular cells with perforated walls and are living in nature.
(c) Bone possesses a hard matrix composed of
and .
45. Fill in the blanks :
(a) Cork cells possesses on their walls that makes it impervious to gases and water.
(b) have tubular cells with perforated walls and are living in nature.
(c) Bone possesses a hard matrix composed of
and .