Idon’t get this can someone explain would be appreciated : )

Answer part A:
                       
                     Genotype ratio:

                                               TT (Homozygous tall plant)
                                               Tt (Heterozygous tall plant)
     
                Phenotype ratio:
                                                4 tall plants

Answer part B:

                         If Tt and Tt plants are crossed with each other then they can produce short offspring, as shown in punnet square 
                        
                              Tt          X           Tt

F1 generation
                               TT, Tt, Tt, tt

Result:

            It is clear from F1 generation that one offspring (tt) is short. 

Nitrate poisoning for the first onebaby blue syndrome

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.