Answer:
Insulin and glucagon
Explanation:
Insulin and glucagon are hormones that help regulate the levels of blood glucose, or sugar, in your body.
 
        
                    
             
        
        
        
Hag Fish and Lamprey 
Vertebrates are the organism which posses a vertibral column(aka the spine or back bone structure), while the earliest had a head they lacked a spine and jaw, these jawless vertebrae lived 500-600 million years ago. they are the ancestors of bony fish which in time became amphibians and other groups of animals
        
             
        
        
        
The term apomorphy means a specialized or derived character state; plesiomorphy refers to a primitive or ancestral trait. An same as autapomorphy is a derived trait that is unique to one group, while a same as synapomorphy is a derived trait shared by two or more groups.