What is the dominant generation in vascular plants?
In vascular plants, the sporophyte generation is dominant. In seedless vascular plants such as ferns, the sporophyte releases spores from the undersides of leaves. The spores develop into tiny, separate gametophytes, from which the next generation of sporophyte plants grows.
Is sphenophyta vascular or nonvascular?
The seedless vascular plants can be divided into three groups: Lycophyta (lycophytes or club mosses), Sphenophyta (horsetails), and Pterophyta (ferns). Lycophytes appeared during the Devonian period but split into two lines during the Carboniferous period.
Do Charophytes have vascular tissue?
Charophytes are multicellular organisms that lack vascular tissue.
Why is sporophyte generation dominant in vascular plants?
It is beneficial to have the sporophyte generation dominant in vascular plants because the sporophyte generation has the vascular tissue. The moss sporophyte is dependent on the gametophyte, which is the dominant generation.
What is dominant generation?
In many plants, the sporophyte generation is the dominant generation. This means that the sporophyte is larger and lives longer than the gametophyte generation.
What is the dominant generation in vascular seedless plants?
The life cycle of seedless vascular plants is an alternation of generations, where the diploid sporophyte alternates with the haploid gametophyte phase. The diploid sporophyte is the dominant phase of the life cycle, while the gametophyte is an inconspicuous, but still-independent, organism.
What type of spores does Lycopodium produce?
Lycopodium is a sporophytic plant and reproduces sexually. The plants are homosporous i.e., produces only one type of spores (without differentiation of mega- and microspores). These spores are produced in sporangia which, in turn, are produced on fertile leaves known as sporophylls.
Are charophytes sporophyte dominant?
All extant green algae (chlorophytes and charophytes) have a dominant haploid (gametophyte) phase, and the only diploid (sporophyte) phase of their life cycle is the unicellular zygote (Haig, 2010) .
Do charophytes have alternation of generations?
Charophytes form sporopollenin and precursors of lignin, phragmoplasts, and have flagellated sperm. They do not exhibit alternation of generations.
What is the advantage of a dominant sporophyte generation?
Sporophytes – a multi-celled, diploid plant body that gives rise to spores. They are the dominant form in most land plants. By mitosis spores produce gametophytes. Advantage of a dominant sporophyte was fertilization and dispersal of new/next generation timed with environmental conditions.
What is sporophyte generation?
Definition of sporophyte : the diploid multicellular individual or generation of a plant with alternation of generations that begins from a diploid zygote and produces haploid spores by meiotic division — compare gametophyte.