Plant Physiology! who can help we with these question? thank you soooo much!!!🤲🏻🩷 7. Discuss various types of seed dormancy.What three environmental factors can often affect a release from seed dormancy? 8. What is the evidence that the ABA:GA ratio controls certain types of seed dormancy? 9. What is vivipary? Based on work with viviparous mutants of maize and Arabidopsis,speculate on the physiological mechanism of naturally occurring vivipary. 10.Discuss how ABA affects the root:shoot ratio under well-watered versus dehydrating conditions. How is ethylene involved in this response? 11.What is the evidence that calcium plays an important role as a second messenger during ABA-induced closure of stomatal guard cells? Where does the calcium come from? 12.Using a labeled diagram,discuss the participation of ABA receptors,various second messengers,changes in the membrane potential,opening and closing of ior channels,the vacuole,and the plasma membrane proton pump in bringing about stomatal closure in response to ABA.Which occurs first, cation efflux or anion efflux?

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