Xylem lacks true vessels in Pteridophytes. 5. In phloem, companion cells and sieve tubes are present in angiosperms. In phloem, sieve cells are present, companion cells and sieve tubes are absent in pteridophytes.

Which component of xylem is absent in Pteridophytes?

Answer: Vascular bundles are present in the Gymnosperms but vessels are absent in the xylem and the phloem lacks the companion cells.

Do Pteridophytes contain vessels?

In pteridophytes vessels are present only in seven genera. The contention lies regarding the presence and distribution of vessel in pteridophytes are the impulsive force of this investigation.