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Chemistry, 04.03.2020 21:03 gracelanghorn

1. are small sacs where oxygen and carbon dioxide are transferred.
A. capillaries
B. lungs
C. alveoli
D. all of the above
2.Animals' quick responses to the environment are due to excitable cells called nerve cells, or neurons.
true or false
plz its urgent might be asking for more questions

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1. are small sacs where oxygen and carbon dioxide are transferred.
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