nasirmozee5102 nasirmozee5102
  • 09-07-2017
  • Biology
contestada

In order for cells in multicellular organisms to exchange gases, a circulatory system must be present.
a. true
b. false

Respuesta :

AgentCold
AgentCold AgentCold
  • 09-07-2017
False because Gas exchange occurs as a result of respiration, when carbon dioxide is excreted and oxygen taken up, and photosynthesis, when oxygen is excreted and carbon dioxide is taken up.
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