This is refered to as the chemical symbol. It is derived from the Latin name for the element which is why some elements like potassium (K) and sodium (N) have symbols different from their name on the periodic table.
        
             
        
        
        
Answer:
O+ x AB- = -A(O)
Explanation: Remember that Rh- is recessive the father may have recessive RH- 
 
        
             
        
        
        
Answer:
Control methods
Biological pest control. Main article: Biological pest control. ...
Cultural control. Cultivation by ploughing exposes insect pests to predators such as black-headed gulls. ...
Trap cropping. Main article: Trap crop. ...
Pesticides. Main article: Pesticide. ...
Hunting. ...
Physical pest control. ...
Poisoned bait. ...
Fumigation.
 
        
             
        
        
        
Hypotonic.
In hypotonic environment, the water moving into the Paramecium cell by osmosis. Paramecium cells regulate water through special organelles which are known as contractile vacuoles. Paramecium is a freshwater organism, which means a hypotonic environment is its typical ambience.