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How do simple organisms exchange substances? O A. Directly across the alveoli. OB. Through spiracles. C. Directly across the external membranes. D. Through specialized gas exchange systems.
asked
Dec 25, 2022
Biology
college
1
answer
17
votes
145k
views
HELP QUICKLY!! ( It's about y- intercept)
asked
May 24, 2022
Mathematics
high-school
1
answer
35
votes
168k
views
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