Answer: A. moisture content of seed must be at least 9%
Step-by-step explanation:
Seeds are the precursors of new plants. These seeds remain dormant for a long time and conditions like availability of water, oxygenated air, sunlight and proper temperature are responsible for seed germination. A seed germinates into plumule and radical. The plumule gives rise to leaves and stem and radical forms the young root.
A. moisture content of seed must be at least 9% is the correct option. The moisture content of the seed is the amount of water available in the seed and it is generally expressed in terms of percentage. The seeds exhibit 12 to 14 percent of the moisture required to maintain the viability of the seed for a long time until it is germinated. Different types of seeds germinate requires different temperature levels for germination, therefore, the optimum temperature of the seeds cannot be considered as same. Also, the above mentioned conditions: water, oxygen, sunlight and proper temperature are required to activate the enzymes present in the seeds.