Question

青蛙的个体发育顺序是

1. A.
   受精卵→卵裂→原肠胚→囊胚→器官分化→蝌蚪→成蛙
2. B.
   受精卵→卵裂→囊胚→原肠胚→器官分化→蝌蚪→变态发育→成蛙
3. C.
   受精卵→卵裂→囊胚→原肠胚→器官分化→蝌蚪→成蛙
4. D.
   受精卵→卵裂→原肠胚→囊胚→器官分化→蝌蚪→变态发育→成蛙

Answer 1

B