The protein and non-protein
Answer: Sea stars move using a water vascular system. Water comes into the system via the madreporite. It is then circulated from the stone canal to the ring canal and into the radial canals.
Explanation: The radial canals carry water to the ampullae and provide suction to the tube feet.
Answer:
C. A giant landmass that existed over 250 million years ago
Explanation:
Pangea was the Earth when the continents were mainly together and there was only one "continent".
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Answer:i am not 100 percent sure but i think the yellow arrows are showing the wasted carbon