Permanent or mature cells are formed by
Cell division in the primary meristem
Cell division in the secondary meristem
Both ($a$) and ($b$)
Specialisation of secondary meristem
Xylem vessels and phloem companion cells are generally absent in
Vessel less angiosperms are
Plant cells without the nucleus are
Given below are two statements:
Statement $I$: Parenchyma is living but collenchyma is dead tissue.
Statement $II$ : Gymnosperms lack xylem vessels but presence of xylem vessels is the characteristic of angiosperms.
In the light of the above statements, choose the correct answer from the options given below:
Distinguish between the following : Exarch and endarch condition of protoxylem