Answer:
Index fossil that is also known as indicator fossil is used to determine the age of the layers of the rocks. It says that the new layer of sedimentary rocks lie over the old layer. 
The deeper we go, the older the rocks we will find. Index fossil of animals that lived or survived only for a short period of time are very useful. An example of index fossil can be Ammonites that were found in Mesozoic era that was about 25-35 million years ago. 
 
        
             
        
        
        
The three main stages of cellular respiration (aerobic) would include Glycolysis, the Kreb's Cycle and the Electron Transport Chain. The Krebs Cycle takes Citric Acid which is a derivative of Pyruvic Acid and converts this through 4 cycles into Hydrogen, carbon dioxide and water in the Mitochondrial Matrix.
        
                    
             
        
        
        
Answer:
<em>No, the rock will not move.</em>
Explanation:
As the scenario in the question is depicting, the force applied on the rock by two friends is equal but in the opposite direction. As a result, as the force is equal and working in opposite directions hence, the rock will not tend to move. If the force applied by one of the friends would be greater or lesser than the rock would have moved from its position depending on the force. 
 
        
             
        
        
        
The protein enables the muscles to...
Protein is the building block of your muscles. Therefore, eating adequate amounts of protein helps you maintain your muscle mass and promotes muscle growth when you do strength training.