Question

Which of the following represents the order of ‘Horse’?
(a)Ferus
(b)Equidae
(c)Perissodactyla
(d)Caballus

Answer 1

Hint: The options given are all horse-related. They have numerous taxonomic terminologies, such as order, family, species, and subspecies. The horse order is a term that means odd-toed and is different from other orders based on it.

Complete answer:
The taxonomic arrangement of horses is as follows:-
Kingdom-Animalia
Phylum-Chordata
Order-Perissodactyla
Family-Equidae
Genus-Equus
Species-ferus
Subspecies-caballus
Perissodactyl is a category of herbivorous mammals distinguished by the possession of one or three hoofed toes on each hindfoot, any member of the order Perissodactyl. The horses, asses and zebras, the tapirs, and the rhinoceroses are included. To distinguish the odd-toed ungulates from the even-toed ones (Artiodactyla), both of which had previously been known as members of a single group, the name of the Greek perissos, 'odd', and daktylos, 'finger' was adopted.
Perissodactyla's name means 'odd-toed'. The name of their order comes from the fact that their middle toe is larger than the others, and a disorder called mesaxonic passes through it, the plane of symmetry of the foot. Most species have three digits on the hindfoot and three or four on the forefoot, but there is just one digit left in some species, the third digit. There are horns in some species, but these are dermal structures without bony cores and in the midline of the skull they are located on the nasals or frontals. This compares with the artiodactyl horns, which are paired, have bone cores, and are situated on the frontals.
So, the correct answer is, ‘Perissodactyla’.

Note: Since their fossil history is so well known, the Perissodactyla are of particular scientific interest. A classic sequence is the evolution of horses from the tiny "dawn horse" to the present form, knowledge of which has played a major role in evolutionary thought.
Perissodactyls, as opposed to the chambered structure of most artiodactyls, have a plain stomach. Their cecum is swollen and sacculated and some bacterial cellulose digestion occurs in it.