S. List two features that distinguish the seedless vascular plants from the bryo
ID: 210623 • Letter: S
Question
S. List two features that distinguish the seedless vascular plants from the bryophytes b. symbiesn biologkal or scientific dictionary, explain the derivation from the Greek of the word symbiosis. 15.2 Phylum Hepatophyta: Liverworts 7. While Is this the plant shown here is one that you didn't study specifically in lab, you should be able to identify it. the gametophyte or the sporophyte of the plant (1x). 8. In what structure does meiosis occur in the bryophytes? 15.4 Phylum Bryophyta: Mosses 9. Identify the type of gametangium shown here. (150x) 290 ExERCISE 15Explanation / Answer
5. Two features that distinguish the seedless vascular plants from bryophytes:
Seed less vascualr plants are pteridophytes. So the differences between pteridophytes and bryophytes are
1. The plant body (the dominant phase of life cycle) is sporophyte
2. Both sporophyte and gametophyte are independent.
3. Vascular tissue or conducting tissue -xylem and phloem are present.
The plant body( dominant phase of life cycle) is gametophyte.
The sporophyte is partially dependent on gametophyte.
Vascular tissue or conducting tissue-xylem and phloem are absent.
6. Symbiosis: It is also called mutualism in which two living organisms of different species living together for a long-term relationship which is essential for both the species and the ecosystem.
For example: Rhizobium leguminosarum bacteria present in the root nodules of the leguminaceae family plants have a symbiotic relationship. Bacteria draw the nourishment from the plant and in turn help in nitrogen fixation in the plant.
15.2: Hepatophyta- liverworts.
7. Liverworts belong to Bryophyta. Hence the plant body shown is gametophyte i.e. gamete producing.
8. Meiosis in bryophytes occurs in spore mother cells during the production of spores.
The sporophyte in bryophytes is produced by sexual reproduction and is diploid. The spore mother cells of the sporophyte are diploid(2n) and undergo meiosis to produce a spore tetrad( four spores). Each spore is haploid(n).
15.4. Phylum Bryophyta: Mosses.
9. The gametangium shown in the diagram is archegonium.
The archegonium is female reproductive structue which consists of ventre, a long neck and a cap. The venter consists of egg cell.
Pteridophytes Bryophytes1. The plant body (the dominant phase of life cycle) is sporophyte
2. Both sporophyte and gametophyte are independent.
3. Vascular tissue or conducting tissue -xylem and phloem are present.
The plant body( dominant phase of life cycle) is gametophyte.
The sporophyte is partially dependent on gametophyte.
Vascular tissue or conducting tissue-xylem and phloem are absent.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.