The first formed primary phloem referred as...$A$... The later formed primary pholem is referred as ...$B$...
Choose the correct combinations of $A$ and $B$
$A$-protoxylem, $B$-metaxylem
$A$-protophloem, $B$-sieve tube cells
$A$-metaploem, $B$-sieve tube cells
$A$-protopholem, $B$-metaphloem
Gymnosperms are also called soft wood spermatophytes because they lack
Write a note on complex tissues.
Passage cells are thin walled cells found in
In parenchyma, thickening is of