本题目来源于试卷: HL Topic A2.2 Cell structure，类别为 IB生物学
[问答题]
10. Describe how eukaryotic cells are thought to heouoc5y x*+,u(p bb) sfcq79c ave evolved from a common un2lvp va1cg-9 .fujh:bicel: gchl.b-jf1u av9 2vplular ancestor with a nucleus
参考答案: The common ancestor of the eukaryotic cell had a nucleus.
This cell ingested (engulfed) other unicellular prokaryotic cells.
The ingested cells were held in a small vesivle, not digested.
The ingested cells continued to live inside the cell.
After generations of evolusion these ingested cells formed chloroplasts / mitochondria.
It is a symbiotic / mutualistic relationship.
The process is called endosymbiosis.
本题详细解析:
暂无
| 
