The diagrams below shows the development of the horse over a period of 40 million years.
Eohippus-40 million years ago
Mesohippus - 30 million years ago
Merychippus - 15 million years ago
Horse - modern
The evolution of the horse, with particular emphasis on the changing foot structure.
The diagram presents the evolution of the horse from Eohippus to modern kind, with particular significant changes in foot structure, in a 40-million-year period.
Initially, the first species of horse, which is called Eohippus, had a small body and a snout. It had tiny toes that were separate from each other. Eventually, about 10 million years after, an ancestor of the modern horse evolved into Mesohippus, which body enlarged while the tail and snout became longer. At this point, the middle toe of its leg also enlarged.
Once the first two evolution stages finished, it can be seen that equine transformed into Merychippus with muzzle like a modern species of horse, developed thigh and an emerged mane, at about 15 million years ago. At the same time, two lateral bones reduced, whereas the middle toe became even large, resembling a hoof. Over time, Merychippus evolved into well-known modern horse with developed elbow, ankle joints, long tail and crest. Here, reduced metacarpals turned into fetlock and a present hoof emerged.
As a result, a horse went through different evolutionary stages before transforming into contemporary type.
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Transition Words or Phrases used:
also, first, if, so, well, whereas, while, as a result
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 3.0 7.0 43% => More to be verbs wanted.
Auxiliary verbs: 1.0 1.00243902439 100% => OK
Conjunction : 5.0 6.8 74% => OK
Relative clauses : 4.0 3.15609756098 127% => OK
Pronoun: 6.0 5.60731707317 107% => OK
Preposition: 28.0 33.7804878049 83% => OK
Nominalization: 2.0 3.97073170732 50% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 972.0 965.302439024 101% => OK
No of words: 184.0 196.424390244 94% => More content wanted.
Chars per words: 5.28260869565 4.92477711251 107% => OK
Fourth root words length: 3.68302321012 3.73543355544 99% => OK
Word Length SD: 2.70195616318 2.65546596893 102% => OK
Unique words: 121.0 106.607317073 114% => OK
Unique words percentage: 0.657608695652 0.547539520022 120% => OK
syllable_count: 302.4 283.868780488 107% => OK
avg_syllables_per_word: 1.6 1.45097560976 110% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 2.0 1.53170731707 131% => OK
Article: 5.0 4.33902439024 115% => OK
Subordination: 1.0 1.07073170732 93% => OK
Conjunction: 0.0 0.482926829268 0% => OK
Preposition: 7.0 3.36585365854 208% => Less preposition wanted as sentence beginnings.
Performance on sentences:
How many sentences: 10.0 8.94146341463 112% => OK
Sentence length: 18.0 22.4926829268 80% => The Avg. Sentence Length is relatively short.
Sentence length SD: 48.4586421601 43.030603864 113% => OK
Chars per sentence: 97.2 112.824112599 86% => OK
Words per sentence: 18.4 22.9334400587 80% => OK
Discourse Markers: 5.4 5.23603664747 103% => OK
Paragraphs: 4.0 3.83414634146 104% => OK
Language errors: 0.0 1.69756097561 0% => OK
Sentences with positive sentiment : 2.0 3.70975609756 54% => More positive sentences wanted.
Sentences with negative sentiment : 0.0 1.13902439024 0% => More negative sentences wanted.
Sentences with neutral sentiment: 8.0 4.09268292683 195% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.259864376256 0.215688989381 120% => OK
Sentence topic coherence: 0.0898959266927 0.103423049105 87% => OK
Sentence topic coherence SD: 0.123427660179 0.0843802449381 146% => OK
Paragraph topic coherence: 0.171992606921 0.15604864568 110% => OK
Paragraph topic coherence SD: 0.140503635735 0.0819641961636 171% => OK
Essay readability:
automated_readability_index: 12.6 13.2329268293 95% => OK
flesch_reading_ease: 53.21 61.2550243902 87% => OK
smog_index: 8.8 6.51609756098 135% => OK
flesch_kincaid_grade: 10.3 10.3012195122 100% => OK
coleman_liau_index: 13.34 11.4140731707 117% => OK
dale_chall_readability_score: 8.91 8.06136585366 111% => OK
difficult_words: 51.0 40.7170731707 125% => OK
linsear_write_formula: 8.5 11.4329268293 74% => OK
gunning_fog: 9.2 10.9970731707 84% => OK
text_standard: 9.0 11.0658536585 81% => OK
What are above readability scores?
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Rates: 78.6516853933 out of 100
Scores by essay e-grader: 7.0 Out of 9
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Note: the e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.