Wednesday, October 6, 2010

What is Life? 種とは(What is species?)


Good morning everyone. I had some important meeting in these days. So, I am very sorry. But I shall start again What is Life?. Today's class is about "species", which is one of the most important theme in biology.


Do you know that there are many types of dog, for example Chihuahua (very small and pretty), and Saint Bernard (very big and strong)? As you may know, they are "dog". The origin of them was same like a wolf. But by the breeding for hundreds years long, their shape has been altered.


Do you know "What it species"? Biologically, species means that the life which can produce next generation repeatedly. Because Leopon, and Mule, which are child between Lion and Tiger, and Horse and Donkey, respectively can not produce child repeatedly, the parents are not same species.


So please think about us "human being". We appeared in Africa 15 million years ago from chimpanzee. We have various color of skin and many rules and religiousness. But we are same species now. 


And also I know that they has 48 chromosomes. On the other hand, we have 46. Are not we other species? The origin of us must be same, and divided each other.


I have found the interesting news about Mr Oliver. He was thought that he had 47 chromosome at that time.


And, I am very interesting about "bonobo". What was happened between them and us at 2 million years ago?


Today's class is over. Have a nice day. Please click the button at the bottom of this What is Life?, if you attended this class. 

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 comment:

  1. 来年度の就職は決まっていますか?世の中の病気で苦しんでいる人たちを救うプロジェクトに参加する気概のある方はいらっしゃいませんか?>ポスドク経験者


Thank you!