<span>The correct answer is that he has injured one of the tendons or ligaments that help keep his knee in place, connecting it to the surrounding muscle and bone. As a result of this injury, his knee is no longer connected to the muscle and bone, thus it wobbled sideways when he started walking. He needs to go to a doctor immediately who can fix his knee so as to prevent further complications - he just needs his knee to be set in place again.</span>
        
                    
             
        
        
        
Explanation:
They can't tranfuse because they will have an ABO incompatibility reaction. In an ABO incompatibility reaction, your immune system attacks the new blood cells and destroys them
If you have type AB you have both A and B antigens. Therefore you have B too that's why you can't only tranfuse with A after all you have to have to have both types. 
 
        
             
        
        
        
Nope it’s always the uppercase letter first then the lowercase one
        
             
        
        
        
Formula to create heat of fusion (hof) i q=m•/\Hf 
to get the amount of heat energy you need to
however much you have gxj/g
find J
        
             
        
        
        
Answer:
Rocks or lava
Explanation:
In 1° succession there is no soil.. And the process of soil formation take very long time. 
In 1° succession rocks or lava is present and lichens, soil erosion, wheathring of rocks helps in soil formation.