An increase in insulating atmospheric gasses (e.g. carbon dioxide)
Answer:
The heart valves
Explanation:
The heart valves prevent blood from flowing in the wrong direction in the heart. The valves are held in the proper place because of the chordae tendinae.
Answer:
ATP is found in mitochondria, and mitochondria are found in the cytoplasm
Explanation:
-Properties that can be observed without changing the identity of the object or substance
-Color, shape, size, density