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Author Question: During chordate evolution, what is the sequence (from earliest to most recent) i (Read 587 times)

federox

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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

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Reply #1 on: Aug 10, 2013
Answer has to be A, 100% :D


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