asked 32.2k views
1 vote
Describe how three different organism -human , flatworms and fern obtain the oxygen they need for survival.

asked
User Jordin
by
8.4k points

1 Answer

5 votes
umm humans breathe pre- produced oxygen made by many bacterias and flatworms and ferns produce oxygen... possibly
answered
User Lokesh Suthar
by
7.8k points
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