bio 常識數問

2007-03-20 4:49 pm
1. 鴕鳥蛋係咪一粒cell~???
2. 有乜動物ge紅血球有nucleus~???
3. 晌小腸度油係透過咩過程被取收???

回答 (2)

2007-03-21 9:41 am
✔ 最佳答案
1. yes

2. the red blood cell of nearly all other vertebrates (except mammals and some salamanders ) have nuclei

3. emulsification -> digestion by lipase -> diffusion + active transport

2007-03-22 13:11:08 補充:
未受精的鴕鳥蛋係一粒cell,因為雞蛋烏蛋也不一定要受精才能生出來。
參考: 自己 + wikipedia
2007-03-21 10:32 am
更正:鴕鳥蛋唔係一粒cell
鴕鳥係體內受精o既
佢o既蛋生出黎之前應該develope緊/develope完
唔只係一粒cell


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