Sometimes sound and uninjured seeds may fail to germinate due to reduced activity of the seed or seed parts resulting in blockade of the growth. This may be due to:

Question

Accepted Answer

Both (a) & (b). Seed dormancy is caused by both internal factors (like embryo immaturity or seed coat impermeability) and external environmental conditions (such as temperature or light). Therefore, both options contribute to the failure of germination despite viable seeds.