吊胃口
发表于 2025-3-23 13:21:32
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FLACK
发表于 2025-3-23 15:06:29
Roles of Germline Stem Cells and Somatic Multipotent Stem Cells in , Sexual Reproductionnd sperm-restricted stem cells (SpSCs). The sex of the individual polyp is determined by the sex of the GSCs present in the body: polyps that have EgSCs are female and produce eggs; while polyps that have SpSCs are male and produce sperm. Occasionally an EgSC transdetermines into an SpSC. The newly
Infect
发表于 2025-3-23 20:42:04
Reproductive Strategies in Marine Hydrozoan Jellyfish: Sexual Medusae and Asexual Polypse two characteristic forms: a sessile polyp and a free-swimming medusa. Sessile polyps multiply through asexual reproduction, whereas free-swimming medusae undergo sexual reproduction by releasing eggs and sperm. Although these reproductive systems are known to be adaptations to seasonal changes in
synovitis
发表于 2025-3-24 00:22:48
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弄污
发表于 2025-3-24 03:05:32
Reproductive Strategies in Annelida: Germ Cell Formation and Regenerationeta, Oligochaeta, Hirudinea (leeches), and Archiannelida, and it is an important link in the evolution of body plan, regeneration, and reproduction. Although annelids generally reproduce sexually, many species can switch to asexual reproduction, proliferating exponentially, as seen in planarians, hy
粗鄙的人
发表于 2025-3-24 07:28:31
Reproductive Strategies in Social Amoeba to form fruits with spores supported on a stalk, sexual multicellular development to generate macrocysts, and unicellular formation of a microcyst. Depending on the environmental cues, the social amoeba adopts one of the reproductive modes in order to survive under unfavorable conditions. The model
短程旅游
发表于 2025-3-24 14:03:01
Environmental Control of Sex Differentiation in ,at. This is known as environmental sex determination (ESD). Under favorable environmental conditions, daphnids produce clonal female offspring by parthenogenesis. Under unfavorable environmental conditions (e.g., short day length, low temperature, food shortage, overpopulation, and/or a combination
Dungeon
发表于 2025-3-24 16:05:23
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积习已深
发表于 2025-3-24 19:37:39
Genetic Control of Sex Determination and Differentiation in Fish from bipotential gonads. Therefore, sex is determined by the direction of gonadal development of a bipotential gonad, which can develop into either a testis or an ovary. Various strategies to determine the sex of a gonad are found in fish, and these strategies range from gonochorism, in which ovari
GET
发表于 2025-3-25 00:50:06
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