1. Introduction-cell division
Cell division is the process by which a parentcell divides into two or more daughter cells. Cell arise only from preexisting cells. Cell division plays several important roles in the live of organism. Cell division on large scale allows some multicellular organism reproduce asexually (such as plants that grow from cuttings.) Among sexually reproducing organisms
2. Types of cell division
Prokaryotes reproduce by a type of cell division ccalled binary fission. In typical prokaryotes, most genes are carried on a circular DNA molecule that, associated protein, constitutes the organism's single chromosome. Although prokayotic chromosomes are much smaller than those of eukaryotes, duplicating them in an orderly fashion and distributing the copies equally to
parent language)인 原始인구어에 대한 기록이나 문헌은 현재 남아 있지 않아 그 모습을 알 수는 없다. 다만, 原始인구어에서 내려 왔다고 생각되는 여러 언어들을 비교 연구함으로써 原始인구어의 대체적인 모습을 再構(reconstruction)할 수 있을 뿐이다.
대체로, 인구어를 사용한 민족은 후기구석기시대에
놀라운 속도로 정보·지식화 과정이 진행되고 있는 오늘날, 이와 같은 시대적 요청과 함께 우리는 끊임없이 학습해야 하는 인간 존재의 본성에 대한 보다 깊이 있는 이해를 바탕으로 체계적이며 지속적으로 학습할 수 있도록 하는 ‘평생학습사회’로 나아가고 있음을 인식할 수 있다. 이러한 사실을
Cell Phone Ringing]
Oh, its my sister. Hello? Hi! Im engaged!
Youre engaged! Thats wonderful. Congratulations!
Oh, my God, youre getting married in two weeks. Thats a little soon.
Wow, Mom and Dad really dont know Bob very well. Dad was okay with this?
Well, Bob asked Dad. Wow, that was very thoughtful of him.
I cant believe he knew to ask Dads permission.
Yeah. [Chuckling]
Im just here with Greg