Tectonic plate movements, volcanic eruptions, earthquakes, and climate change have shifted wildlife habitats, wiped out large numbers of species, and created opportunities for the evolution of new species. Hope this helped!
        
             
        
        
        
Answer: The genotype of the generation resulting from the given P ( parental generation) is Aa that is all offsprings in the first generation will be heterozygous dominant.  
The genotype of the parents is AA and aa and the gametes produced by these parents are A and a respectively.
When these gametes fuse, they result in the offsprings with genotype Aa. This represents a dominant phenotype due to the presence of dominant gene  (  a gene that masks the expression of recessive gene and expresses itself), which is A in this case.
 
        
                    
             
        
        
        
Viruses are not considered alive, because they lack certain aspects that would be considered a living organism.
        
             
        
        
        
Answer: decrease to it’s carrying capacity