By designing and performing an experiment.
Explanation:
A hypothesis is an educated guess or theory, so to test a hypothesis, one would not only design an experiment, but perform it as well.
BB and Bb would be blue because they are both dominant and bb would be green because it is recessive
Explanation:
fumes from vehicles is the most common cause of air pollution
Evidence for evolution is provided by homologous structures. These are structures shared by related organisms that were inherited from a common ancestor. Other evidence for evolution is provided by analogous structures.