Which of the following statements is false?

(I) Pollen grains represents immatured male gametophyte

(II) In angiosperms partially developed male gametophytes are pollinated

(III) Generative cell is siponogenous while vegetative cell is spermatogenous

(IV) Formation and differentiation of pollen grains is called microsporogenesis

(V) Hay fever is a pollen allergy

(VI) Pollen grains of some plants produce severe allergy and respiratory or bronchial diseases

(VII) Pollen grains are poor in nutrients.