Bordered pits are very common in
Monocotyledons
Gymnosperms
Dicotyledons
Pteridophytes
Give functions of companion cells.
Transport of food material in higher plants takes place through
The first formed primary phloem referred as...$A$... The later formed primary pholem is referred as ...$B$...
Choose the correct combinations of $A$ and $B$
The commercial jute fibres are obtained from