Question

Which of the following mammals is not an odd-toed ungulate?
A. Rhinoceros
B. Camel
C. Zebra
D. Horse

Answer 1

Hint: Perissodactyla is the order of animals or mammals which are odd-toed ungulates. Odd toed ungulates involve mammals that put their whole body weight in one of the five toes: the third toe (three is an odd digit, so-called as odd-toed ungulate).

Complete answer: Horse, Rhinoceros, Zebra are odd-toed ungulate mammals i.e. they belong to order Perissodactyla. Camels are not odd-toed ungulates. Camels are even-toed ungulates and single hoofed animals. Even toed ungulates put their whole weight in two of their five toes i.e. third and fourth, and the remaining toes can either be absent, present, vestigial, etc. Even toed ungulates are hoofed animals that belong to order Artiodactyla. Whales, Dolphins, Porpoises are aquatic cetaceans, they have evolved from even-toed ungulates. A Camel has a hump on its back, it is the fatty deposition. Camel has great importance in milk and in the textile industry as well. As camels live in the desert, they are responsible for the transport of passengers. Zebras are closely related to donkeys and horses. All the three donkeys, zebra and horses belong to the same genus i.e. Equus.
Hence, the correct answer is option B.

Additional information: Mammals are vertebrate organisms that have mammary glands which produce milk to feed their young ones. Humans are an example of mammals.

Note: There are about 270 land-based even-toed ungulate species of animal which include sheep, goat, cattle, lamas, pigs etc. The hippopotamus is a semiaquatic even-toed ungulate that has evolved from land-dwelling even-toed ungulates.