The diagrams present the 4 steps of the evolution procedure of horses regarding the variation of their feet over the past 40
million
Use synonyms
years
.
Use synonyms
Overall
, there are totally four time periods in the whole process, Eohippus, Linking Words
Mesohippus
, Meryvhippus and Use synonyms
Horse
. The four stages were separated by 1 Use synonyms
million
, 1.5 Use synonyms
million
and 1.5 Use synonyms
million
Use synonyms
years
respectively.
Forty Use synonyms
million
Use synonyms
years
ago, one of the species of horses was called Eohippus, Use synonyms
which
every horseshoe had five forks. Compared to modern horses, the Eohippus were very small. As for their appearance, some spots can be seen on their skin. 10 Correct word choice
and
million
Use synonyms
years
later, another type of Use synonyms
horse
called Use synonyms
Mesohippus
emerged. In Use synonyms
this
stage, the Linking Words
Mesohippus
had a bigger body and one of the toes on their hooves was diminished into three. At the same time, the spots they originally had have Use synonyms
also
disappeared.
The next stage was the emergence of Merychippus 15 Linking Words
million
Use synonyms
years
ago. Compared to the Use synonyms
Mesohippus
, the Merychippus seemed taller and bigger. It can be noticed that their fur is darker and spotted. In Use synonyms
this
period, their hooves remain three-lobed. Linking Words
Finally
, in modern times, the Linking Words
horse
, as we are familiar with it, appeared. At Use synonyms
this
stage, the Linking Words
horse
finished its development period and showed more obvious features. Houses are much stronger than the Use synonyms
last
evolution and their hooves are no longer separate, but one.Linking Words
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