Mammalian sexual reproduction

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First, knowledge about the reproductive endocrinology of these ectothermic vertebrates can provide a clearer picture of the evolution of reproductive hormones and their effects on target organs. Sätt ditt betyg ». Av lärosätet Stockholms universitet. Australia's Amazing Kangaroos Ken Richardson. EDT Hume kr.

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Left-right specification in the embryonic and larval development of amphibians Chapter

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Reproductive Physiology of Marsupials

The last chapters in the book discuss the structure and function of male accessory sex glands with associated pathologies as well as recent updates in male contraception, mechanism of androgen action, and genomics of male infertility. Brood Parasitism in Birds. In he stepped down as Director of the Centers to focus his efforts on his research. It was recently reported that the self-sterile mechanism of a hermaphroditic marine invertebrate ascidian is very similar to the self-incompatibility system in flowering plants. Hos arter där graden av polygami är hög — dvs då vissa hanar parar sig med väldigt många honor och andra inte lyckas para sig alls, är det ofta även stor skillnad i storlek mellan könen. En på året sen brunst, den kraftiga viktnedgången och en mycket begränsad tid för fysisk återhämtning innan kommande vinter kan vara förödande och i värsta fall leda till döden. Sätt ditt betyg ».

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