Plate boundaries are the edges where two points meet.
The branch of biological science that studies the external and internal structure of the body and the physical relationship among body parts is called ___Anatomy_____.
Infrared rays are felt <span>as heat is transferred between Earth and the atmosphere</span>
Answer:
Since sea urchins are picky, they are used as indicator organisms in public aquariums to determine if the system is functioning properly. This is because they are very "picky" about water quality. If the water is contaminated, the sea urchins will be the first to show signs of stress, spines laying down or falling off. Do use an aquarium filter and do clean up the day after feeding. Any metal exposed to the seawater will corrode and poison the tank. A dying sea urchin will often spawn out and rot out, causing the others in the tank to spawn and die as welll.
Explanation:
