The correct answer is B. Thymus gland: enables immature lymphocytes to mature into T cells
ATP, which is a storage molecule that stands for adenosine triphosphate. The body requires ATP in order to be able to perform basic functions. ATP is found in the mitochondria of cells.
White Blood cells Because they are produced in your body and they are constantly used more than they are replaced
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:
Ur intercostle muscle between ur ribs
