By which of the following methods can seed dormancy be broken or its duration be reduced?

Dry seeds can endure higher temperatures than germinating seeds because:

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?

Which of the following is $NOT$ essential for seed germination?

Treatment of seed at low temperature under moist conditions to break its dormancy is called