Question

The sequence in evolution of horse was
A. Equus, Eohippus, Meshohippus, Merychippus
B. Eohippus, Meshohippus, Merychippus, Equus
C. Meshohippus, Eohippus, Equus, Merychippus
D. Merychippus, Meshohippus, Eohippus, Equus

Answer 1

Hint: Evolution is the change of species and their characteristics over several generations and relies on the process of natural selection. The theory of evolution is based on the idea that all species are related to each other and change over a certain time.
The term natural selection is the differential survival and reproduction of individuals because of differences in phenotype. Natural selection is the key mechanism of evolution, the change in the characteristics of a population over generations.

Complete Answer:
We know that every genus incorporates a group of firmly related species.
- The evolution of horse or a mammal of the family Equidae, happened over a geologic time of 50 million years, transforming the small, dog-sized, forest-dwelling Eohippus into the modern horse.
- Eohippus was around during the early Eocene era about 50 million years ago. Meshohippus existed approximately 35 million years ago between the late. Merychippus is of the family Equidae that was endemic to North America during the Miocene, 15.97–5.33 million years ago. Equus is a genus of mammals in the family Equidae, which includes horses, donkeys, and zebras; it appeared 4 - 4.5 million years ago.

From the above information, we can conclude that Eohippus, Meshohippus, Merychippus, Equus are the correct sequence form of evolution of horses.

Thus, option B is the correct answer.

Note: Odd-toed ungulates have been able to combine together a more complete outline of the evolutionary lineage of the modern horse than of any other animal. The evolution of the horse took place in North America mostly, where horses originated but became extinct about 10,000 years ago.
- The horse belongs to the order odd-toed ungulates, the members which have hoofed feet and an odd number of toes on each foot, as well as mobile upper lips and a similar tooth structure. This means that horses share a common ancestry with tapirs and rhinoceroses.