This task-allocation system, similar to a division of labor is flexible in that all tasks rely on either the number of ant encounters ( which take the form of antennal contact ) and the sensing of chemical gradients ( using olfactory sensing for pheromone trails ) and can thus be applied to the entire ant population.
32.
The blind form of the Mexican tetra is different from the surface-dwelling form in a number of ways, including having unpigmented skin, having a better olfactory sense by having taste buds all over its head, and by being able to store four times more energy as fat, allowing it to deal with irregular food supplies more effectively.
