During chordate evolution, what is the sequence (from earliest to most recent) i

Author Question: During chordate evolution, what is the sequence (from earliest to most recent) i (Read 623 times)

federox

Sr. Member
Posts: 308

on: Aug 8, 2013

During chordate evolution, what is the sequence (from earliest to most recent) in which the following structures arose?
1.    amniotic egg
2.    paired fins
3.    jaws
4.    swim bladder
5.    four-chambered heart
A) 2, 3, 4, 1, 5
B) 3, 2, 4, 1, 5
C) 3, 2, 1, 4, 5
D) 2, 1, 4, 3, 5
E) 2, 4, 3, 1, 5

theo

Hero Member
Posts: 698

Reply #1 on: Aug 10, 2013

Answer has to be A, 100%

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