Which life stage dominates? what processes make up the general life cycle of spermatophytes In general, the cation content of groundwater reflects the chemical make up of the rocks encountered along the flow path, and the anion content is indicative of the progress of chemical reactions. WebThe microspores on germination produce the male gametophytes on which, the sperms are produced. Spermatophytes also include plants bearing ovules enclosed in a protective cover called ovary, such plants are called Angiosperms. The superiority of dispersal by means of seeds over the more primitive method involving single-celled spores, lies mainly in two factors: the stored reserve of nutrient material that gives the new generation an excellent growing start and the seeds multicellular structure. (credit: R.G. Firstly, ejaculate is made up of two components: The sperm, which comes from the testicles, and the seminal fluid, which is produced in other organs, including the prostate. . Therefore, the life cycle of plants is known as alternation of generations. 2. The sporophyte is homosporous synangium. - All angiosperms have flowers, usually bisexual (both sexes in the same flower). Dr. Jack Pearson is a previously HCPC registered Embryologist with a PhD in reproductive medicine. The evolution of gymnosperms can be traced back to the Paleozoic era, during . The embryo is a tiny plant that has a root, a stem, and one or more leaves. Each branching point, called a node, is the point at which a single taxonomic group (taxon), such as a species, separates into two or more species. In seed plants, the evolutionary trend led to a dominant sporophyte generation accompanied by a corresponding reduction in the size of the gametophyte from a conspicuous structure to a microscopic cluster of cells enclosed in the tissues of the sporophyte. The female gametophyte may remain within remnants of the spore wall in the megasporangium until after fertilization has occurred and the embryo begins to develop.

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