Thursday, December 30, 2010

What is Life? Evolution from invertebrates to vertebrates 3(無脊椎動物から脊椎動物への進化その3)

Good morning everyone. There are few days in this year. Have you finished your work what you have to do in this year? If you have not completed the greeting cards, you should carry it out soon(^_^). The next year will come soon.


Yes, at today Sammy carries on the course about evolution from invertebrates to vertebrates. Until the last class, I showed the classification of animals and the importance of sea urchin for discovering such mystery. Shall we go.


(5) Metamorphosis
In the first of this special class, Sammy showed about metamorphosis. Most animals undergo metamorphosis in their development from juvenile to adult. The most familial example may be frogs. As you saw it when you were child in your country, the tadpoles of frog live like fishes, grow by feeding, and perform the metamorphosis with obtaining four legs. Such drastic alteration is shared in other many species for example, jerry fishes, clams, crabs, insects, and also sea urchins. But the hormonal controls of metamorphosis were well studied only in amphibia and insects. Such hormonal control of sea urchins was not cleared, although sea urchin is the greatest target to reveal the question of the evolution. So in order to elucidate the mechanism of the evolution, we tried to identify the factors of metamorphosis of sea urchin.


Today's class is over. Have a nice day. Click the button at the bottom of this "What is Life?", if you are a student of this class. Mind you? If you have any question about life, please send an e-mail for me.


にほんブログ村 科学ブログ 生物学・生物科学へ人気ブログランキングへ



  1. とても素敵に忠信最中の写真を撮っていただきありがとうございました。今度は是非佐藤家の古里・飯坂へお越しいただき継信・忠信のお話をさせていただきたいと思います。


  2. To Mrs.最中



    From 生き物博士


Thank you!