Land breezes and sea breezes both are breezes, that is how they are similar.But they are different because one breeze is blowing from the sea to the land also called a "sea breeze",and one breeze is blowing from the land to the sea also called a "land breeze"
The scientist can conclude that the plants that were used in this experiment contained both a dominant and recessive allele. That the plants were hybrids which causes the off springs to have a 3:1 ratio.