If t = dominant, and t = recessive, what would the genotypes be?

All of the following are part of the biosphere except

Why do cells appear different in distilled water than they do in 10% salt water?

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out