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- Biological_life_cycle abstract "In biology, a life cycle is a series of changes in form that an organism undergoes, returning to the starting state. "The concept is closely related to those of the life history, development and ontogeny, but differs from them in stressing renewal." Transitions of form may involve growth, asexual reproduction, and/or sexual reproduction.In some organisms, different "generations" of the species succeed each other during the life cycle. For plants and many algae, there are two multicellular stages, and the life cycle is referred to as alternation of generations. The term life history is often used, particularly for organisms such as the red algae (Rhodophyta) which have three multicellular stages (or more), rather than two.Life cycles that include sexual reproduction involve alternating haploid (n) and diploid (2n) stages, i.e., a change of ploidy is involved. To return from a diploid stage to a haploid stage, meiosis must occur. In regard to changes of ploidy, there are 3 types of cycles:haplontic life cycle — the haploid stage is multicellular and the diploid stage is a single cell, meiosis is "zygotic".diplontic life cycle — the diploid stage is multicellular and haploid gametes are formed, meiosis is "gametic".haplodiplontic life cycle (also referred to as diplohaplontic, diplobiontic, or dibiontic life cycle) — multicellular diploid and haploid stages occur, meiosis is "sporic".The cycles differ in when mitosis (growth) occurs. Zygotic meiosis and gametic meiosis have one mitotic stage: mitosis occurs during the n phase in zygotic meiosis and during the 2n phase in gametic meiosis. Therefore, zygotic and gametic meiosis are collectively termed haplobiontic (single mitotic phase, not to be confused with haplontic). Sporic meiosis, on the other hand, has mitosis in two stages, both the diploid and haploid stages, termed diplobiontic (not to be confused with diplontic).".
- Biological_life_cycle thumbnail Culex_mosquito_life_cycle_en.svg?width=300.
- Biological_life_cycle wikiPageExternalLink books?id=8icTHQAACAAJ&dq=Life+cycles+%E2%80%94+Reflections+of+an+evolutionary+biologist:+By+John+Tyler+Bonner&hl=pt-BR&sa=X&ei=8rT5UKbGNejo0gH12YH4Bw&ved=0CC8Q6AEwAA.
- Biological_life_cycle wikiPageExternalLink CycleOfSilkworm.
- Biological_life_cycle wikiPageExternalLink 016953479290195H.
- Biological_life_cycle wikiPageExternalLink 1.htm.
- Biological_life_cycle wikiPageExternalLink Mable1998.pdf.
- Biological_life_cycle wikiPageID "319610".
- Biological_life_cycle wikiPageRevisionID "601967290".
- Biological_life_cycle hasPhotoCollection Biological_life_cycle.
- Biological_life_cycle subject Category:Biology.
- Biological_life_cycle subject Category:Reproduction.
- Biological_life_cycle comment "In biology, a life cycle is a series of changes in form that an organism undergoes, returning to the starting state. "The concept is closely related to those of the life history, development and ontogeny, but differs from them in stressing renewal." Transitions of form may involve growth, asexual reproduction, and/or sexual reproduction.In some organisms, different "generations" of the species succeed each other during the life cycle.".
- Biological_life_cycle label "Biological life cycle".
- Biological_life_cycle label "Ciclo biológico de vida".
- Biological_life_cycle label "Ciclo de vida".
- Biological_life_cycle label "Ciclo vitale biologico".
- Biological_life_cycle label "Cycle de vie (biologie)".
- Biological_life_cycle label "Cykl życiowy".
- Biological_life_cycle label "Lebenszyklus (Biologie)".
- Biological_life_cycle label "Levenscyclus".
- Biological_life_cycle label "Жизненный цикл (биология)".
- Biological_life_cycle label "دورة حياة (أحياء)".
- Biological_life_cycle label "生活環".
- Biological_life_cycle sameAs Životní_cyklus.
- Biological_life_cycle sameAs Lebenszyklus_(Biologie).
- Biological_life_cycle sameAs Ciclo_biológico_de_vida.
- Biological_life_cycle sameAs Cycle_de_vie_(biologie).
- Biological_life_cycle sameAs Siklus_kehidupan_biologi.
- Biological_life_cycle sameAs Ciclo_vitale_biologico.
- Biological_life_cycle sameAs 生活環.
- Biological_life_cycle sameAs 생활환.
- Biological_life_cycle sameAs Levenscyclus.
- Biological_life_cycle sameAs Cykl_życiowy.
- Biological_life_cycle sameAs Ciclo_de_vida.
- Biological_life_cycle sameAs m.01vbgn.
- Biological_life_cycle sameAs Q513359.
- Biological_life_cycle sameAs Q513359.
- Biological_life_cycle wasDerivedFrom Biological_life_cycle?oldid=601967290.
- Biological_life_cycle depiction Culex_mosquito_life_cycle_en.svg.
- Biological_life_cycle isPrimaryTopicOf Biological_life_cycle.
