UPPSC 2017 General Studies I Solved Paper

(a) Ant has the largest brain in proportion to its body size. The brain to body mass ratio of ant is 1:7, while that of small birds is 1:12, human is 1:40, elephant is 1:560. Dolphins have the highest brain-to-body weight ratio of all cetaceans. Small mammals such as mice have a similar ratio to humans, while elephants have a comparatively lower ratio.