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Home Q & A Board Biology-Related Homework Help General Biology
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alemvrocha alemvrocha
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5 years ago
One of the most important branch points in the evolution of animals and their nervous systems was the appearance of
A) radial symmetry.
B) bilateral symmetry.
C) the spinal column.
D) specialized cells for transmitting signals.
Textbook 
Campbell Biology: Concepts and Connections

Campbell Biology: Concepts and Connections


Edition: 8th
Authors:
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Ablaze123Ablaze123
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5 years ago
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alemvrocha Author
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5 years ago
this is exactly what I needed
Lawson1981
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Yesterday
Thanks
SupremeDJ
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2 hours ago
Brilliant ツ
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