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,
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Answer:
 Plural form of ovary is ovaries.
The abbreviation that represents as desired is ad lib
 
        
             
        
        
        
Answer:
According to the pyramid of energy, the energy content is maximum in autotrophs or producers. Autotrophs are the plants which prepare their food by photosynthesis. They are the primary producers and primary source of food energy. The flow of energy is unidirectional from producer to consumer level.
Explanation:
 
        
             
        
        
        
To protect our eyes from moisture and light. Example: from sweat. It can also reduce the amount of light that gets in your eyes and keep dirt away from them too.