theak420 theak420
  • 12-07-2017
  • Geography
contestada

Mammals lead more active lives than reptiles because mammals have body hair and more efficient hearts and___?

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janisssss
janisssss janisssss
  • 13-07-2017
I believe it's "lungs".
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Аноним Аноним
  • 21-12-2018

your answer is lungs

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i really need help with this