A) stratification
B) scarification
C) vernalization
D) photoperiodism
Correct Answer: B
Solution :
Seeds with hard seed-coat may remain impermeable to water and oxygen thereby remaining dormant. The seed-coat of such seeds is either broken mechanically (mechanical scarification) or by treating with strong acids, such as \[{{H}_{2}}S{{O}_{4}}\] (chemical scarification). Stratification is the way in which plants of different species are arranged in different vertical layers in order to make full use of the available physical and physiological requirements. Photoperiodism is the response of plant to the relative length and timing of light and dark conditions. The term photoperiodism was first used by Garner and Allard (1920). Vernalization is the acquisition or acceleration of the ability of flower by a chilling treatment. The term was first formulated by T. D. Lysenko (1928).
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