<span>deoxyribonucleic acid or DNA. </span>
        
                    
             
        
        
        
Answer:
When the flea bit someone, the <u><em>plague bacteria</em></u> would get transferred to that person.
<em>Hope this helps.</em>
 
        
                    
             
        
        
        
Answer: 
Global Warming is simply the long-term rise in temperature of the Earth's core, which inevitably would effect the climate systems of the Earth.
The Green House Effect is the natural process that warms the Earths surface.
Explanation: 
The Green House Effect--> When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back into space and the rest is absorbed and re-radiated by the greenhouse gases.
 
        
                    
             
        
        
        
Phylogenetic trees show the evolutionary pathways and connections among organisms. A phylogenetic tree is a diagram used to reflect evolutionary relationships among organisms or groups of organisms.