The visual pigment in animal cells consists of an isomer of retinal linked to the protein opsin, as shown below. Write an alternative resonance form for this species that shows the positive charge situated on the starred carbon instead of the nitrogen atom and include the curved arrows to show the electron flow. 
Definitions:
Return
The amount of profit or loss gained from an investment relative to its initial cost.
Project A
Not a definitive key term without additional context; it likely refers to a specific, named project within a given context. NO.
Net Present Value
The gap between how much cash comes in and goes out, measured in present value terms, during a certain period.
Net Present Value
A comparison of the present value of cash receipts and disbursements over a specific duration.
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