What is the probable sequence in which the following clades of animals originated, from earliest to most recent?
1. tetrapods
2. vertebrates
3. deuterostomes
4. amniotes
5. bilaterians
A) 5 ? 3 ? 2 ? 4 ? 1
B) 5 ? 3 ? 2 ? 1 ? 4
C) 5 ? 3 ? 4 ? 2 ? 1
D) 3 ? 5 ? 4 ? 2 ? 1
E) 3 ? 5 ? 2 ? 1 ? 4
Answer: B
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Biology
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