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.
The small molecules that come together to form polymers are called "monomers". Sometimes small numbers of monomers can come together to form medium-sized molecules; there might be two repeating units, forming a dimer, or three repeating units, forming a trimer, and so on.
Answer:
The answer is D, a process that recycles elements and other matter through the biosphere.
Explanation:
Answer:
Increased blood flow kills healthy cells which prevents infection at the site of the injury.
Increased blood flow carries white blood cells to the site of the injury.
Explanation:
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