The circulatory system and respiratory system are protected by your skin, muscles, and ribs.
ddhdhdhfhfjfjjfjfjfjfjfjcjcjcjxjc
Having more then one independent variable will give unreliable results. Hope this helps
Answer:
I believe they are called a population, tell me if I'm wrong.
Answer:
6. Because of how old the rocks are
Explanation:
6. Sedimentary rock forms in layers because of the order they were formed. The older rocks will form first and as time goes on, rock forms above it to create a new layer, and so on.
