Although the author argues three main theories for the extinction of a huge marine mammal called Steller's sea cow in the marine environment of Bering Island near the coast of Siberia in 1768, the professor finds them dubious and brings up three counter claims to refute them all. Actually, the professor claims these reasons are not real and for each reason, there is a critic.
Firstly, the author takes the view that the reason of extinction is overhunting by native Siberian people. However, the professor gainsays this idea and believes that the size of this mammals are too huge, about nine meters long with the weight of virtually ten tones that cannot be hunted easily. In addition, the small number of native Siberian lived in a small village that one of these sea cows was enough to feed them all. Thus, the professor is skeptical about why they should have hunted them all.
Furthermore, the author argues that another reason for their extinction would be disruption in ecological condition which affected on their food resources such as kelps, a type of sea vegetation. The professor, on the other hand, asserts that if the condition and their ecosystem underwent to sever problems, it would have happened for almost all species not just for sea cows. Moreover, if kelps were extinct, there would have been myriad of food resources of other fish to feed on them.
Eventually, the author claims that another main reason of their extinction is arrival of European fur traders who hunted those using special weapons during 1741 to 1768. Conversely, the professor states that this extinction took place soon after the European arrival to Siberia. Besides, there are evidences that show the extinction had begun before their presence in those areas. So, they are not responsible for this extinction even though they might hunted some of them.
Grammar and spelling errors:
Line 3, column 180, Rule ID: THIS_NNS[1]
Message: Did you mean 'these'?
Suggestion: these
...this idea and believes that the size of this mammals are too huge, about nine meters...
^^^^
Transition Words or Phrases used:
actually, besides, conversely, first, firstly, furthermore, however, if, moreover, so, thus, in addition, such as, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 13.0 10.4613686534 124% => OK
Auxiliary verbs: 6.0 5.04856512141 119% => OK
Conjunction : 4.0 7.30242825607 55% => More conjunction wanted.
Relative clauses : 11.0 12.0772626932 91% => OK
Pronoun: 32.0 22.412803532 143% => Less pronouns wanted
Preposition: 38.0 30.3222958057 125% => OK
Nominalization: 14.0 5.01324503311 279% => Less nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1551.0 1373.03311258 113% => OK
No of words: 309.0 270.72406181 114% => OK
Chars per words: 5.01941747573 5.08290768461 99% => OK
Fourth root words length: 4.1926597562 4.04702891845 104% => OK
Word Length SD: 2.39726980649 2.5805825403 93% => OK
Unique words: 172.0 145.348785872 118% => OK
Unique words percentage: 0.556634304207 0.540411800872 103% => OK
syllable_count: 462.6 419.366225166 110% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 2.0 3.25607064018 61% => OK
Article: 11.0 8.23620309051 134% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 3.0 2.5761589404 116% => OK
Performance on sentences:
How many sentences: 13.0 13.0662251656 99% => OK
Sentence length: 23.0 21.2450331126 108% => OK
Sentence length SD: 55.6956012626 49.2860985944 113% => OK
Chars per sentence: 119.307692308 110.228320801 108% => OK
Words per sentence: 23.7692307692 21.698381199 110% => OK
Discourse Markers: 10.1538461538 7.06452816374 144% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 3.0 4.33554083885 69% => OK
Sentences with negative sentiment : 6.0 4.45695364238 135% => OK
Sentences with neutral sentiment: 4.0 4.27373068433 94% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.348681169057 0.272083759551 128% => OK
Sentence topic coherence: 0.11291418849 0.0996497079465 113% => OK
Sentence topic coherence SD: 0.0644581617818 0.0662205650399 97% => OK
Paragraph topic coherence: 0.19886506586 0.162205337803 123% => OK
Paragraph topic coherence SD: 0.0192663594934 0.0443174109184 43% => Paragraphs are similar to each other. Some content may get duplicated or it is not exactly right on the topic.
Essay readability:
automated_readability_index: 14.1 13.3589403974 106% => OK
flesch_reading_ease: 56.59 53.8541721854 105% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 11.1 11.0289183223 101% => OK
coleman_liau_index: 12.13 12.2367328918 99% => OK
dale_chall_readability_score: 8.35 8.42419426049 99% => OK
difficult_words: 70.0 63.6247240618 110% => OK
linsear_write_formula: 13.0 10.7273730684 121% => OK
gunning_fog: 11.2 10.498013245 107% => OK
text_standard: 13.0 11.2008830022 116% => OK
What are above readability scores?
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Rates: 80.0 out of 100
Scores by essay e-grader: 24.0 Out of 30
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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.