Tracheae

Q. Match the type of xylem cell to its characteristic feature.

1. Thin walled
2. Obliterated lumen
3. Perforation plates
4. Tapering ends

Q. Vessels are found in:

1. All angiosperms and some gymnosperm
2. Most of the angiosperm and few gymnosperms
3. All angiosperms, all gymnosperms and some pteridophyta
4. All pteridophyta