Answer:
The node
Explanation:
Each branch point on the cladogram represents where species split off into new ones. The node represents the last point at which 2 new species shared a common ancestor. 
 
        
             
        
        
        
So white blood cell’s(WBCs for short) main job is to fight infections.
They do this by swallowing the infection.
You see,WBCs do not have a permanent shape.this means that they enlarge and decrease size of parts of their body.So they grow two long arm like structures called pseudopodia which swallow the infection.(pseudopodia means false feet).
You can see the process in the photo I attached from google
 
        
        
        
It's body cells would have 40 chromosomes and its gametes would contain half of the total genetic information, 20 chromosomes.
        
                    
             
        
        
        
Relative Age Determined by Fossils 
What is Relative Age? Relative Age = Means the age of one object compared to the age of another object. Relative age of rocks and fossils are determined by: – Ordering of rock layers – Index fossils  hopes it helps you beautiful :P