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The Living World 8th Edition by George Johnson
النسخة 8الرقم المعياري الدولي: 978-0078024214The Living World 8th Edition by George Johnson
النسخة 8الرقم المعياري الدولي: 978-0078024214 تمرين 21
A very diverse and successful group, the heavily armored placoderms had been entirely replaced by the end of the Devonian by sharks. What evolutionary advantages did sharks have over placoderms that drove this success?
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Early shes, such as those seen in the ag...
The Living World 8th Edition by George Johnson
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