Can two organisms with the same phenotype have different genotypes?

Let's look BB and Bb

They both have the dominant trait which means they both have the same physical appearance (phenotype) , but while BB has both dominant and Bb has one dominant and one recessive that means that although Bb has the same phenotype as BB, it has a different genotype because it has a bit different genetic makeup

b. climate change will cause an increase in biodiversity of all ecosystems.

hope this