Answer:
I think that birds have different bill lengths because of their habitats and their diet. Also natural selection and evolution has also played a factor due to the fact that birds have not always looked the way that they do now, for example the Archaeopteryx a  bird that lived around the time of the dinosaurs had a shorter and more powerful bill to grind insects and small mammals
Explanation:
 
        
             
        
        
        
Answer:Enzymes that makes redox reactions possible in a biochemical process includes those that help to catalyze the transfer of electrons, atoms, or functional groups.
Explanation:
Here are some class categories of these enzymes and their roles ;
• Oxidoreductases - Transfer of electrons (hydride ions or H atoms) 
• Transferases - Group- transfer reactions
• Hydrolases - Hydrolysis reactions (transfer of functional groups to water)
• Lyases - Addition of groups to double bonds, or formation of double bonds by removal of groups Transfer of groups within molecules to yield isomeric forms
• Isomerases - Formation of C-C, C-S, C--0, and C-N bonds by condensation reactions coupled to ATP cleavage 
 The above are however classified, given code numbers, and assigned names according to the type of transfer reaction, the group donor, and the group acceptor.
  
        
             
        
        
        
B) 
Because it flows. I dunno about you, but that sounds like a liquid to me! Sorry if i'm wrong.
        
                    
             
        
        
        
An organism can "make a living" and survive in its niche.
 
        
             
        
        
        
Answer:
Meiosis
Explanation:
Because meiosis is a reduction division