Cnidaria and flatworms exchange gases and remove wastes by way of their
A. open circulatory systems.
B. moist skin surfaces.
C. closed circulatory systems.
D. respiratory and excretory systems.
E. gastrovascular cavities.
Answer: E
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A) the movement of hydrogen ions across the inner mitochondrial membrane B) the citric acid cycle C) fermentation D) the electron transport chain
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What will be an ideal response?
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Answer the following statement true (T) or false (F)