That fact can be explained by the similarity in their genes. 
Dogs and coyotes are from the same class, family and genus (Mammalia, Canidae, Canis). 
This is almost enough for their offspring to be viable. But if the DNA is similar (which it is) offspring the chances of viable and fertile offspring is high almost at 100%.
Hope it helped,
Happy homework/ study/ exam!
        
             
        
        
        
I am guessing an Ecological Relationship as it is dependent on it's environment
        
             
        
        
        
Answer:
D: Nucleus
Explanation:
Prokaryotic cells contain a cell membrane, a cell wall, and cytoplasm. However, they do not have a nucleus. Eukaryotic cells have a nucleus.
 
        
             
        
        
        
Relaxing into the breath
Exhaling
Soothing thoughts
Pulling new air inside
Inhaling
Repeat
All the oxygen to your brain
Taking your time
Intermittent
Onwards and upwards
Nice and deep