Answer:
O With training, the puppies are likely to excel at agility competitions.
O Without training, the puppies are no more likely to succeed at agility competitions than any other dog.
Explanation:
This two options speaks the same thing and are the correct option. 
The phenotype of an organism is a product of genotype and environment
P=G+E
The litters can inherit the trait of running, having a good vigour and ability to win agility competition but when the environment do not allow this trait to be expressed the trait can be masked i. e may not find expression. 
The environment ensure that this litters are been taught the rudiment of agility competition to ensure they win if they are not been taught, they many not know they have the ability to win and will not be different from other dogs.
The training is what brings out the potential in them that can later be seen and expressed in the competition.
 
        
                    
             
        
        
        
Self-compatibility (SC)
Mechanisms of single-locus self-incompatibility
i believe those are two of them
        
             
        
        
        
An obligatory parasite is a parasite that can not complete its life cycle without exploiting a suitable host
 
        
             
        
        
        
Response would be correct, as in response to environment. 
        
             
        
        
        
Answer:
Snapper population is decreasing
Explanation:
The population is decreasing since the human population is increasing dramatically.  As the human population increases, the demand for fish and seafood also increases since humans eat seafood and fish.  As the demand for fish increases, fishermen fish for these snappers more often and in bigger loads.  Snappers cant reproduce faster than these fishermen are hunting for them and so the population decreases