Answer:   
Cane toads were introduced intentionally in Australia in 1935 to combat cane beetles in the sugar cane crop fields. These toads exhibit higher feeding capacity. These can feed not only cane beetles but other insects which affecting agricultural yields. They are poisonous in nature, they kill any insect after ingestion. Therefore, they are useful biological insecticide which provides crops resistance against insects. 
 
        
                    
             
        
        
        
Answer:
O type blood (ii) and AB type Blood (IAIB) 50% of their children will have type A blood (IAi) and 50% will have type B blood (IBi)
Explanation:
 
        
                    
             
        
        
        
An element have the same number of protons as  electrons.
Therefore: if an element x (Lawrencium) has 103 protons, it has 103 electrons.