So Mendel got roughly 75% yellow and 25% green in f2. This means that f1 contains all heterozygous genes, as shown below
 Y y
Y YY Yy
y Yy yy
Summary: 75% YY or Yy, 25% yy
Which means that green (y) is a recessive phenotype, while yellow (Y) is a dominant phenotype, since plants with heterozygous genotype Yy express the yellow trait.
        
             
        
        
        
The answer is to your question is A
        
             
        
        
        
Sometimes it can be very difficult and sometimes it can be very easy.
        
             
        
        
        
Higher trophic level is further up the food chain. Further up you go there are less and less competitors. So the answer is true
        
             
        
        
        
Do you have different answers that go with the question?