Flashcards. Where a seta is present it elongates early, while the spore capsule is still undeveloped, and the elongation is by production of additional cells. The moss life cycle follows the pattern of alternation of generations. When mature, most mosses develop sex organs . Internal Structure 4. Alternation of generations is a life cycle that includes both diploid and haploid multicellular stages. how does the gametophyte produce gametes. Expert Answer . Twisting and swinging of seta in dry weather further aids in the dispersal of spores. Which Portion Of The Moss Life Cycle Is Free-living? The … Habit and Habitat of Selaginella: Selaginella is the only living genus of the order Selaginellales and is commonly known as ‘spike moss’ or ‘small club moss’. male or female. Show transcribed image text. antheridia -where the sperm form. Pathogenic and opportunistic free-living amoebae such as Acanthamoeba spp., ... Life cycle Three stages: amoeba, cyst and flagellate ... pons, medulla oblongata, and the upper portion of the spinal cord. Moss Life Cycle. CT scans may show obliteration of the cisternae around the midbrain and the subarachnoid space over the cerebral hemispheres. Life Cycle Patterns. How Could You Tell This By Looking At The Plan? During adverse environmental conditons, the cells produces nearly identical gametes. The sporophyte generation is represented only by the one-celled zygote, sometimes called zygospore. Created by. In mosses, liverworts, and ferns, the gametophyte is photosynthetic and free living. The gametophyte is the sexual phase in the life cycle of plants and algae. Spell. Terms in this set (15) green leafy part of a moss: haploid or diploid. A single spore germinates to form a branched, filamentous protonema, from which a leafy gametophyte develops. The gametophyte bears organs for sexual reproduction. See the answer. Learn. At certain times of the year the moss undergoes sexual reproduction, resulting in a sporophyte that is attached to and dependent on the. PLAY. Previous question Next question Transcribed Image Text from this Question. When egg and sperm merge, they form a … The life cycle of most mosses begins with the release of spores from a capsule, which opens when a small, lidlike structure, called the operculum, degenerates. In diploid cells, one copy of the chromosomes comes from each parent. mitosis. STUDY. In a species with a long seta the growing sporophyte breaks through the enveloping calyptra. How Could You Tell This By Looking At The Plan? The male gametophyte develops structures known as. nattirw. When the surface of moss plant is wet, the mature antheridia absorb water and burst releasing the male gametes antherozoids. Must grow close together and must have H2O to complete their life cycle Sperm swims to egg through drops of water during fertilization; H2O moves cell-to-cell by osmosis; Sphagnum moss is known for its moisture holding capacity, absorbing up to 20 times its dry weight with water. In a nutshell, haploid gametophytes produce haploid gametes, which can be sperm or eggs. Life Cycle of Funaria: Sexual and Vegetative Life Cycle. The most familiar structure is the haploid gametophyte, which germinates from a haploid spore and forms first a protonema: usually, a tangle of single-celled filaments that hug the ground.