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because, for them, the question is: sex is good for what? The German biologist August Weismann, in 1889, noted that the function of sex might not be to allow a multiplicity of beings, because many species reproduced without the use of partners. We can prove this by burying a piece of branch rose bush on the ground for a new plant (Fonseca, Friedrich Leopold August Weismann (1834 - 1914), German biologist. He proposed the existence of the barrier Weismann. This barrier hinders, if not completely, somatic cells to pass information to the germ cells. Therefore, it is important, in conceptual terms, to strengthen the theory of natural selection by Charles Darwin. Source: Edwin G. Conklin, "August Weismann" Proceedings of the American Philosophical Society, Vol 54, No. 220. Iii-xii. In asexual reproduction, the children are almost copies of the genetic parents. This type of reproduction appears to be an excellent way of a living pass their genes to offspring. Many organizations, such as flatworms (terrestrial and aquatic worms), can generate new beings by fission (split) of the body. The unicellular microorganisms simply split into two. Some insects such as aphids and even some more complex animals like some lizards, fish and amphibians, in certain periods of the year, produce eggs which originate verbatim copies of parents So all beings reproduce! Some animals such as fish, reptiles, amphibians, insects, among other things, require the environment as a source of energy to maintain the body temperature (pecilotermos or ectothermic). A sudden change in temperature can intervene in the reproduction of these beings. Most plants and animals reproduce sexually by adding genes from the mother to the father (cross-breeding). For this type of reproduction occurs no need of gametes (reproductive cells), which generally have half the number of chromosomes of the species. Thus, the fusion of a female gamete with a male gamete, called fertilization. SEARCH You know why the human testes are located on the outside of the body?
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jer, za njih, pitanje je: seks je dobar za što? Njemački biolog kolovoz Weismann, 1889, napomenuti da funkcija spola ne može se dopustiti mnoštvo bića, jer mnoge vrste reproducirati bez uporabe partnera. Možemo dokazati strane pokapaju komad grane grm ruža na terenu za nova postrojenja (Fonseca, Friedrich Leopold kolovoz Weismann (1834 - 1914), njemački biolog. On je predložio postojanje prepreka Weismanna. Ova barijera otežava, ako ne i potpuno, somatskih stanica proći informacije na zametne stanice. Dakle, važno je, konceptualno, ojačati teoriju prirodne selekcije Charlesa Darwina. Izvor: Edwin G. Conklin, "August Weismann" Proceedings of the American filozofsko društvo, Vol. 54, br. 220 (Listopad-prosinac 1915), str III-XII.. U aseksualni reprodukcije, djeca su gotovo kopije genetskih roditelja. Ova vrsta umnožavanja, kako se čini odličan način život prođe svoje gene na potomstvo. Mnoge organizacije, kao što su flatworms (kopnene i vodene crvi), može generirati nove bića koje fisije (Split) od tijela. Jednostaničnih mikroorganizama jednostavno podijeliti u dva dijela. Neki kukci poput lisne uši, pa čak i neke složenije životinje poput nekih guštera, riba i vodozemaca, u određenim razdobljima u godini, proizvodnju jaja koja potječu točne kopije roditelja Tako su sva bića razmnožavaju! Neke životinje, kao što su riba, gmazova, vodozemaca, insekata, između ostalog, zahtijeva okruženje kao izvor energije za održavanje tjelesne temperature (pecilotermos ili ectothermic). Nagle promjene u temperaturi može intervenirati u reprodukciji tih bića. Većina biljke i životinje razmnožavaju spolnim dodavanjem gena od majke do oca (križanje). Za ovaj tip reprodukcije javlja nema potrebe gamete (spolne stanice), koji općenito imaju upola manje kromosomima vrste. Dakle, spoj ženske spolne stanice s muške spolne stanice, naziva oplodnja. TRAŽI Znate li zašto je ljudski testisi se nalazi na vanjskoj strani tijela?