Distinguish between the following : Exarch and endarch condition of protoxylem
Exarch condition of protoxylem | Endarch condition of protoxylem |
$(1)$ When protoxylem is towards periphery and metaxylem towards centre such vascular bundles are found in roots. | $(1)$ If protoxylem towards centre and metaxylem towards periphery such vascular bundles are called endarch vascular bundles, found in stems. |
Give differences : Sieve cell and Sieve tubes
The chief water conducting elements of xylem in gymnosperms are
Permanent or mature cells are formed by
A common structural feature of vessel elements and sieve tube elements is
Which element of xylem is the characteristic feature of angiosperms?