Summarize the points made in the lecture, being sure to explain how they challenge the specific theories presented in the reading passage
In the reading passage, the author claims the three main cause of the extinction of steller's sea cow (a kind of sea cow lived in the water off the coast of Siberia). On the other hand, the professor closely examines each of three reasons and reveals that the reasons rely on doubtful assumptions which render the argument unconvincing. According to him, we still do not know the exact reason of Stelle's sea cow extinction.
Firstly, the author points out that since sea cows were good sources of food in a harsh environment, they may have been overhunted by the natives of Serbian people. However, the lecturer views this point from an another angle and explains that the Steller's sea cows were quite enormous animals with 9 meters long. On the other hand, the population of Siberian area was small and thus, they didn't need a lot of sea cows for their food. Considering this point, overhunting would not be an effective reason for extinction.
Secondly, the writer claims that the disturbances of ecosystems have caused a decline in the sea cows’ main source of food, kelp. Therefore, the shortage of the food was responsible for the extinction of sea cows in 1768. On the other hand, the lecturer definitely refutes this point by saying that if the disturbances of ecosystems have happened, they would affect other marine animals. But, the evidence shows that other marine animals’ decline did not happen. For example, the wheels population were not declined at that time although, it was a marine animal.
Finally, the writer mentions that arriving European fur trader after 1741 was the main reason for sea cows’ extinction. The professor opposes this point by saying that population of sea cows was declining for hundreds of years. The European fur trader just arrived the island when the population of sea cows was quite small. Thus, the reason which led to a decrease in sea cow's population started from many years ago should be regarded as the culprit of sea cows extinction, not the appearance of European at the last a few years.
Grammar and spelling errors:
Line 3, column 210, Rule ID: AN_ANOTHER[1]
Message: One of these determiners is redundant in this context. Choose only one: 'an angle' or 'another angle'.
Suggestion: an angle; another angle
...ver, the lecturer views this point from an another angle and explains that the Stellers sea cows...
^^^^^^^^^^^^^^^^
Line 3, column 391, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: didn't
... Siberian area was small and thus, they didnt need a lot of sea cows for their food. ...
^^^^^
Line 5, column 491, Rule ID: POSSESIVE_APOSTROPHE[1]
Message: Possible typo: apostrophe is missing. Did you mean 'wheels'' or 'wheel's'?
Suggestion: wheels'; wheel's
...ecline did not happen. For example, the wheels population were not declined at that ti...
^^^^^^
Discourse Markers used:
['but', 'finally', 'first', 'firstly', 'however', 'if', 'may', 'second', 'secondly', 'so', 'still', 'therefore', 'thus', 'for example', 'kind of', 'on the other hand']
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance in Part of Speech:
Nouns: 0.294416243655 0.261695866417 113% => OK
Verbs: 0.129441624365 0.158904122519 81% => OK
Adjectives: 0.0685279187817 0.0723426182421 95% => OK
Adverbs: 0.0507614213198 0.0435111971325 117% => OK
Pronouns: 0.0177664974619 0.0277247811725 64% => OK
Prepositions: 0.144670050761 0.128828473217 112% => OK
Participles: 0.0329949238579 0.0370669169778 89% => OK
Conjunctions: 2.59956615405 2.5805825403 101% => OK
Infinitives: 0.00507614213198 0.0208969081088 24% => Some infinitives wanted.
Particles: 0.00253807106599 0.00154638098197 164% => OK
Determiners: 0.139593908629 0.128158765124 109% => OK
Modal_auxiliary: 0.010152284264 0.0158828679856 64% => OK
WH_determiners: 0.00761421319797 0.0114777025283 66% => OK
Vocabulary words and sentences:
No of characters: 2061.0 1645.83664459 125% => OK
No of words: 349.0 271.125827815 129% => OK
Chars per words: 5.90544412607 6.08160592843 97% => OK
Fourth root words length: 4.32221490584 4.04852973271 107% => OK
words length more than 5 chars: 0.329512893983 0.374372842146 88% => OK
words length more than 6 chars: 0.243553008596 0.287516216867 85% => OK
words length more than 7 chars: 0.183381088825 0.187439937562 98% => OK
words length more than 8 chars: 0.103151862464 0.113142543107 91% => OK
Word Length SD: 2.59956615405 2.5805825403 101% => OK
Unique words: 173.0 145.348785872 119% => OK
Unique words percentage: 0.495702005731 0.539623497131 92% => More unique words wanted or less content wanted.
Word variations: 51.7221687029 53.8517498576 96% => OK
How many sentences: 16.0 13.0529801325 123% => OK
Sentence length: 21.8125 21.7502111507 100% => OK
Sentence length SD: 37.1609674255 49.3711431718 75% => OK
Chars per sentence: 128.8125 132.220823453 97% => OK
Words per sentence: 21.8125 21.7502111507 100% => OK
Discourse Markers: 1.0 0.878197800319 114% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 3.0 3.39072847682 88% => OK
Readability: 46.1678008596 50.5018328374 91% => OK
Elegance: 2.38461538462 1.90840788429 125% => OK
Coherence and Cohesion:
Essay topic to essay body coherence: 0.392981415463 0.549887131256 71% => OK
Sentence sentence coherence: 0.13013809551 0.142949733639 91% => OK
Sentence sentence coherence SD: 0.0804323164193 0.0787303798458 102% => OK
Sentence paragraph coherence: 0.619473095243 0.631733273073 98% => OK
Sentence paragraph coherence SD: 0.1343980572 0.139662658121 96% => OK
Sentence topic coherence: 0.198288009107 0.266732575781 74% => OK
Sentence topic coherence SD: 0.0985471422992 0.103435571967 95% => OK
Paragraph paragraph coherence: 0.516853728178 0.414875509568 125% => OK
Paragraph paragraph coherence SD: 0.0522557233213 0.0530846634433 98% => OK
Paragraph topic coherence: 0.31722963077 0.40443939384 78% => OK
Paragraph topic coherence SD: 0.0556599905968 0.0528353158467 105% => OK
Task Achievement:
Sentences with positive sentiment : 3.0 4.33554083885 69% => OK
Sentences with negative sentiment : 3.0 4.45695364238 67% => OK
Sentences with neutral sentiment: 10.0 4.26048565121 235% => Less neutral sentences wanted.
Positive topic words: 3.0 3.49668874172 86% => OK
Negative topic words: 3.0 3.62251655629 83% => OK
Neutral topic words: 8.0 3.1766004415 252% => OK
Total topic words: 14.0 10.2958057395 136% => OK
What are sentences with positive/Negative/neutral sentiment?
---------------------
Rates: 73.3333333333 out of 100
Scores by essay e-grader: 22.0 Out of 30
---------------------
Note: This is not the final score. 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.