Which of the given events does not happen during seed germination?

Why do newly harvested potato tubers not germinate even when placed in favourable conditions?

Positively photoblastic seeds germinate only in the presence of

Which of the following is not a man-made method to overcome seed dormancy?
$(I)$ Seed coat broken by using knives,sandpapers,etc.
$(II)$ Passage of seed through the digestive tract of animals.
$(III)$ Effect of inhibitory substances can be removed by subjecting the seeds to chilling conditions.
$(IV)$ By application of certain chemicals like gibberellic acid and nitrates.

Which of the following is important for seed storage?

Legume seeds exhibit dormancy because of