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Sporophyte – Diploid multicellular stage in the life cycle of a plant or alga; Alternation of generations – Reproductive cycle of plants and algae; Archegonium – Organ of the gametophyte of certain plants, producing and containing the ovum; Antheridium – Part of a plant producing and containing male gametes
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A gametophyte is one of the two alternating multicellular phases of the fern life cycle. The gametophyte is haploid. The other stage is the diploid sporophyte. A gametophyte is a multicellular organism that develops from a haploid spore (that has one set of chromosomes).
Gametophyte of the fern Onoclea sensibilis (flat thallus, bottom) with a descendant sporophyte beginning to grow from it (small frond, top) The situation is quite different from that in animals, where the fundamental process is that a multicellular diploid (2n) individual directly produces haploid (n) gametes by meiosis. In animals, spores (i.e ...
The list of organisms by chromosome count describes ploidy or numbers of chromosomes in the cells of various plants, animals, protists, and other living organisms.This number, along with the visual appearance of the chromosome, is known as the karyotype, [1] [2] [3] and can be found by looking at the chromosomes through a microscope.
Prothallus of the tree fern Dicksonia antarctica (note new moss plants for scale) Spore-bearing plants , like all plants, go through a life-cycle of alternation of generations . The fully grown sporophyte , what is commonly referred to as the fern , produces genetically unique spores in the sori by meiosis .
Diagram showing the alternation of generations between a diploid sporophyte (bottom) and a haploid gametophyte (top) A sporophyte (/ ˈ s p ɔːr. ə ˌ f aɪ t /) is the diploid multicellular stage in the life cycle of a plant or alga which produces asexual spores. This stage alternates with a multicellular haploid gametophyte phase.
Polystichum munitum, the western swordfern, [1] is an evergreen perennial fern native to western North America, where it is one of the most abundant ferns in forested areas.It occurs along the Pacific coast from southeastern Alaska to southern California, and also inland east to southeastern British Columbia, northern Idaho and western Montana, with disjunctive populations in northern British ...