Diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? check all that apply

The punnett square predicts the ratio of genotypes in the offspring, based on the genotypes of the parents. in this cross, tallness (h) is dominant to shortness (h). based on the punnett square, what is the phenotype of the offspring? hh hh tall short