The lone-pair of electrons on nitrogen in the following molecule reside in what type of orbital? 
Definitions:
Leaf Structure
The anatomy of a leaf, including layers like the epidermis, mesophyll, and veins, which are adapted for photosynthesis and transpiration.
Subsidiary Cells
Plant cells surrounding guard cells in the epidermis, supporting the function of stomata in gas exchange and transpiration.
Epidermal Cells
Cells that make up the outer layer of skin in animals or the outer layer of cells in plants, serving as a protective barrier.
Chloroplasts
Organelles present in plant and algal cells responsible for photosynthesis, where conversion of sunlight into chemical energy takes place.
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