(π) If any one of the organelles is absent, the working of the entire cell is disturbed because functions of all the organelles are interlinked. For example, if mitochondria are absent, the other organelles would not get any energy for their working.
(ππ) Unity and division of labour.
(πππ) A village community has a farmer, barber, shopkeeper, carpenter, etc. All these have different professions but are interdependent. For example, a farmer provides food for everyone and in turn gets different services from other people.