Aerenchyma is helpful in plants by

Which are the sugar-conducting components in gymnosperms and pteridophytes?

The end walls of tracheids and vessels,respectively,are:

Food material stored in xylem parenchyma in the form of................

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:

Which of the following plant cells lack a vacuole and a nucleus at maturity?