Explain how abscisic acid promotes the closure of stomates.Identify the molecules involved at each step. 
A.________
B.________
C.________
D.________
Definitions:
MACRS
The Modified Accelerated Cost Recovery System, a method of depreciation for tax purposes allowing for faster recovery of assets' costs to stimulate investment.
Straight-Line Depreciation
An approach to spreading the expense of a tangible asset across its lifespan in uniform yearly sums.
Income Taxes
Taxes levied by governments on the income generated by businesses or individuals within their jurisdiction.
Changing Depreciation Methods
The process of altering the accounting method used to allocate the cost of a tangible asset over its useful life for financial reporting purposes.
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