Is Pterophyta sporophyte dominant?
The zygote develops into a sporophyte, which at first depends upon the gametophyte, but when mature is rooted in the soil and independent. – Live in wet, humid places. – Are seedless. – Sporophyte is the dominant generation.
What are the characteristics of Pterophyta?
Primary characteristics of Pteridophytes are as follows: They are seedless, vascular plants that show true alternation of generations. Furthermore, the sporophyte has true roots, stems and leaves. They reproduce by spores, which are developed in sporangia. They may be homosporous or heterosporous.
Is Pterophyta a fern?
The largest group of living seedless vascular plants—and probably the most familiar—are the ferns with about 12,000 species, over two‐thirds of which are tropical.
Does Pterophyta produce spores?
General characteristics of Pterophyta Their sexual reproduction is done through spores.
How are mosses and pteridophytes different?
Option:B – Pteridophytes have a well developed vascular system and have xylem and phloem, while bryophytes lack vascular tissues. Thus vasculature is a distinguishing feature of pteridophytes and bryophytes.
What did Lycophytes evolve into?
Evolution of lycophytes Lycophytes are believed to be the oldest living lineage of vascular plants. Estimates of their evolution date back to more than 400 million years ago during the Silurian Period, long before gymnosperms and angiosperms.
What are pteridophyte plants?
A pteridophyte is a vascular plant (with xylem and phloem) that disperses spores. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as “cryptogams”, meaning that their means of reproduction is hidden.
Are Monilophytes pteridophytes?
There are two different classifications of ferns: the monilophytes and the pteridophytes. Monilophytes include true ferns like the leptosporangiates, the largest group of ferns including over nine thousand species worldwide, while the term pteridophytes include both ferns and some other vascular plants.
Is polypodium a Pterophyte?
Polypodium is a genus of ferns in the family Polypodiaceae, subfamily Polypodioideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). They are terrestrial or epiphytic ferns, with a creeping, densely hairy or scaly rhizome bearing fronds at intervals along its length.
Is Psilotum a bryophyte?
In Psilotum, much like in bryophytes (especially mosses), the embryo starts out with a single pole of growth that points away from the foot. Growth from the apical cell of this pole produces the undifferentiated branching sporophyte axis (Fig. 5).
Is Siphonostele modified?
Actinostele is a modification of C) Protostele. Protostele is an arrangement of conducting vascular tissues found among some lower plants where a solid cylinder of xylem is surrounded by a layer of phloem. It is considered to be a very basic and primitive arrangement of vasculature.
How many living genera of pteridophytes are Heterosporous?
9 genera
According to Rashid (1976) only 9 genera of Pteridophytes are heterosporous. These are Selaginella, Isoetes, Stylites, Marsilea, Pilularia, Regnellidium, Salvinia, Azoll and Platyzoma.