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Mathematics 9 Online
OpenStudy (anonymous):

i will give a medal Which pair of animal groups below includes animals that do not have backbones? A. reptiles and birds B. arachnids and mammals C. insects and arachnids D. fish and insects

OpenStudy (anonymous):

fish have backbones, so do birds

OpenStudy (anonymous):

arachnids don't

OpenStudy (anonymous):

so c

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