Nectar is provided by flowers to help facilitate the dispersal of pollen by attracting pollenators. Insects and Angiospersms (flowering plants) have a shared evolutionary history and have coevolved with each other. Here we see an ant (Myrmecocystus sp.) drinking the nectar of Isomeris "bladder bulb". The plant is losing out as ants are notoriously poor pollenators. This is an example of exploitation found in nature. 
The Purple flower is a species of Mallow being exploited by Formica moki, an ant found in San Diego Count
y. Below is the intended recipient of the nectar fast asleep after a long night out!
y. Below is the intended recipient of the nectar fast asleep after a long night out!
