The adaptation of vertebraes to the land could not be considered complete until the evolution of the___
A. lung
B. notochord
C. amniote egg
D. bony skeleton
2007-05-01 07:49:23 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Biology
There are lung fish, so I don't think its A. However, amniotes are the group of tetrapods (living members include reptiles, birds and mammals) that have acquired a number of new adaptations to life on land, including specifically, a terrestrially adapted egg.
2007-05-01 08:00:19 · answer #1 · answered by kt 7 · 0⤊ 0⤋
It's C.
before that they were obliged to visit the water to leave their eggs.
2007-05-01 15:02:11 · answer #2 · answered by E.T. 2 · 0⤊ 0⤋
I am positive it is A
2007-05-01 15:03:13 · answer #3 · answered by harbinc6103 1 · 0⤊ 0⤋
I'm guessing---- A. lung
2007-05-01 14:54:38 · answer #4 · answered by ve 2 · 0⤊ 0⤋
I'm going to say (A) lung.
2007-05-01 14:54:36 · answer #5 · answered by maguire1202 4 · 0⤊ 0⤋