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Q: Which vertebrates are endothermic? birds, reptiles, amphibians, mammals, bony fish
A: birds
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User: Which vertebrates are endothermic? birds, reptiles, amphibians, mammals, bony fish

Weegy: birds
earnonline724|Points 169|

User: During embryonic development, if the anus develops before the mouth, the organism is a _____. protostome, deuterostome, invertebrate, vertebrate

Weegy: During embryonic development, if the anus develops before the mouth, the organism is a what? B.deuterostome
pearly|Points 230|

User: With the exception of echinoderms, invertebrates are _____; chordates, echinoderms, and vertebrates are _____. soft-bodied; hard-bodied, acoelomates; coelomates, protostomes; deuterostomes, radially symmetrical; bilaterally, symmetrical

Weegy: Invertebrates have been the most abundant and successful multicellular organisms on the planet since at least the Cambrian Period over 500 mya. We are still in the age of the invertebrates and I don't expect that will change any time soon.
craig1990|Points 205|

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Asked 10/19/2012 10:21:35 AM
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