Question

Animals which have well-developed echolocation system like that of bats are
A. Wild cats
B. Beavers
C. Primates
D. Whales and dolphins
E. Hedgehogs

Answer 1

Hint: Echolocation is a special technique used by some organisms to determine the location of objects. This will allow the animals to move around in the dark, navigate, hunt and identify the prey and avoid obstacles.

Complete step by step answer: a. Wildcats - It has pointed ears which are medium-sized in length and is broader at the base. They have whiskers which are white and are seven to sixteen in number. They normally hunt their prey by stalking and then chase and kill.
b. Beavers - They are known to build excellent dams and lodges using tree branches and mud. They use their incisor's tooth to chew off the branches. Dams help them to impound water and lodges help them to take shelter. The tail is an important part of the beaver because it kills its prey from its tail.
c. Primates - They have larger brains as compared to other mammals and they also have increased visual activity and sense of smell which is a dominant sensory organ in most of the mammals. These senses are more developed in monkeys and apes.
d. Dolphins and whales - Dolphins and whales locate their food and other objects in the ocean through special techniques called echolocation. In this technique, they produce a short broad spectrum of pulses that sounds like “clicks” and these are reflected from the objects and gives information to the animals of how big or small the object is or how close or far the object is.
e. Hedgehogs - They are nocturnal animals but few species are active even during day times. Hedgehogs sleep during the day under grasses, bushes, rocks, or mostly in their dens which is underground.
Hence, the correct answer is option D.

Note: This sonar system is a biosensor that helps the whales and dolphins, bats, and few other vertebrates to locate the distance of the objects by echolocation. These organisms emit high-pitched sounds that bounce off the objects which are in its path and produce an echo. They quickly respond to the echo and skilfully avoid obstacles and helps in capturing its prey. Other organisms cannot identify this echo or they can hear only a limited amount of sound which I produced during echolocation.