Key is to lock as D. Substrate is to active site.
        
                    
             
        
        
        
Aggergate is usually found in:
Floodplains
Alluvial fans
Mines
 
        
                    
             
        
        
        
Because through natural selection, only the fittest survive. when the fittest come together and reproduce then the species continues and evolves with only the fittest and strongest genes.
        
                    
             
        
        
        
Answer:
Point A - Intrusive igneous rock
Point B - Extrusive igneous rock 
Explanation:
Intrusive igneous rocks are rocks which is formed by molten magma that cools and solidifies below and within the surface of the earth, thereby forming large crystals beneath the earth surface. Examples of Instrusive igneous rocks gabbro, granite, peridotite etc.
Intrusive Ignoeus rock is formed at point A in the diagram given above.
Extrusive Ignoeus rock, on the other hand, is the opposite of Intrusive igneous rock. Extrusive igneous rock is formed when molten rocks, called magma, erupts from beneath the earth and cools and solidifies on the surface of the earth, thereby forming small crystallized rocks. Examples of extrusive igneous rocks are basalt, pumice, etc.
Extrusive Ignoeus rocks would formed at point B in the diagram above.
 
        
             
        
        
        
Answer: 
It effects the body by causing symptoms like muscle aches, low-grade fever, headaches, sometimes rashes, swelling of the lymph glands may also occur, and flu-like illness. These are symptoms after a few weeks of being infected.