Which structure is common to both xylem elements (tracheary elements) and sieve tube elements?

Aerenchyma is formed in the tissue of

Damaged sieve tubes are sealed by the deposition of:

$A$ fibre which contains simple pits is

Collenchyma tissue is characterized by

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: