Q. The first terrestrial plants which possess vascular tissues show
Solution:
Pteridophyta is the first land plants that have developed certain unique features:
1. There is a presence of conducting tissues, like xylem and phloem.
2. They have truly differentiated roots, rhizomatous stem, and leaves.
3. They have the diploid sporophytic generation which is predominant and the haploid gametophytic generation much shorter.
4. Sporangia are the aggregates of the spore-bearing leaves which helps in the completion of the life cycle of these plants.
5. Seeds are not produced in these plants. Some genera present in this division showed a one-step movement towards the seed habit which Gymnosperms and Angiosperms show, by becoming heterosporous.
1. There is a presence of conducting tissues, like xylem and phloem.
2. They have truly differentiated roots, rhizomatous stem, and leaves.
3. They have the diploid sporophytic generation which is predominant and the haploid gametophytic generation much shorter.
4. Sporangia are the aggregates of the spore-bearing leaves which helps in the completion of the life cycle of these plants.
5. Seeds are not produced in these plants. Some genera present in this division showed a one-step movement towards the seed habit which Gymnosperms and Angiosperms show, by becoming heterosporous.