They both have two types of DNA for twins
Answer:
the part that is labeled y helps the plant get water, since plants arent like us they need to have something in their cell to help them get water because they can't just get up and go get a drink like us.
The answer for this is Density
I believe you meant 'selective breeding'.
Selecitve Breeding is when say a dog breeder, chooses two prospective parents in hopes of achieveing a superior offspring or offspring with desired traits.