Design an experiment design an experiment to determine whether the pink flowers of petunia plants result from incomplete dominance

Well you could use two petunias one white and one red. Assuming the red is Homozygous
Allow them reproduce a seed and allow it to grow. If the petunia that grows from the seed is pink it could be possible to say that this occured due to incomplete dominance.

R-Red r-white. Genotype of parents RR-Homzygous dominant rr- homozygous recessive
  
      r       r
R  Rr    Rr
R  Rr    Rr 

Progeny- All pink Rr.

Hope this helps.

Reduction in overall biodiversity

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.