The main differences between emitter and collector are doping concentration and size. The emitter is heavily doped, while the collector is lightly doped. You could try to swap them, but you'll get a very low \$H_{FE}\$, probably even less than 1.
Image Credit: Photo: Oxmoor House. SEASON: Although available year-round, eggplant is at its peak from July to October. CHOOSING: When selecting, look for eggplants with firm, glossy skin. Size and color vary widely among types, but the eggplant should feel heavy. Avoid those with wrinkled skin, soft spots, or brown patches.
Eggplant (Solanum melongena), or aubergine, is a species of nightshade grown for its edible fruit. Eggplant is the common name in North America and Australia, but British English uses aubergine. It is known in South Asia, Southeast Asia and South Africa as brinjal. Other common names are melongene, garden egg, or guinea squash.