The zebra mussel, a freshwater shellfish native to Eastern Europe, has long been spreading out from its original habitats and has now reached parts of North America. There are reasons to believe that this invasion cannot be stopped.
The reading states that why the invasion of zebra mussel shellfishes is unstoppable and discusses three reasons. However, the speaker refutes each reason and says that we can stop them using the new available methods.
First, the reading states that most of the zebra mussels are transformed from Europe to the east coast of North America by ships and their transfer cannot be stopped. But the professor thinks that there is a way to stop this from happening. He explains that if ships empty their ballast water in the middle of the ocean and before reaching the north east coast, there will be no zebra mussels in their ballast water tanks.
Second, the reading claims that zebra mussels can dominate the new habitat because they have no predators in their new habitat. The professor rejects this reason by giving an example of an aquatic bird in Europe that eats these freshwater shellfishes. He also reminds that birds or other animals can shift their food source to these creatures just like aquatic birds.
Third, the passage claims that zebra mussels may cause a population reduction in all fishes kinds but the professor explains that also they eat plankton they produce a waste that bottom eating fishes can eat as food. As a result, there is a specimen which can proliferate in their habitat.
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Transition Words or Phrases used:
also, but, first, however, if, may, second, so, third, as a result
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 6.0 10.4613686534 57% => More to be verbs wanted.
Auxiliary verbs: 8.0 5.04856512141 158% => OK
Conjunction : 7.0 7.30242825607 96% => OK
Relative clauses : 12.0 12.0772626932 99% => OK
Pronoun: 28.0 22.412803532 125% => Less pronouns wanted
Preposition: 20.0 30.3222958057 66% => OK
Nominalization: 2.0 5.01324503311 40% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1089.0 1373.03311258 79% => OK
No of words: 222.0 270.72406181 82% => More content wanted.
Chars per words: 4.90540540541 5.08290768461 97% => OK
Fourth root words length: 3.8600083453 4.04702891845 95% => OK
Word Length SD: 2.31339089934 2.5805825403 90% => OK
Unique words: 125.0 145.348785872 86% => More unique words wanted.
Unique words percentage: 0.563063063063 0.540411800872 104% => OK
syllable_count: 321.3 419.366225166 77% => OK
avg_syllables_per_word: 1.4 1.55342163355 90% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 2.0 3.25607064018 61% => OK
Article: 6.0 8.23620309051 73% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 0.0 2.5761589404 0% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 10.0 13.0662251656 77% => Need more sentences. Double check the format of sentences, make sure there is a space between two sentences, or have enough periods. And also check the lengths of sentences, maybe they are too long.
Sentence length: 22.0 21.2450331126 104% => OK
Sentence length SD: 43.7914375192 49.2860985944 89% => OK
Chars per sentence: 108.9 110.228320801 99% => OK
Words per sentence: 22.2 21.698381199 102% => OK
Discourse Markers: 6.6 7.06452816374 93% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 0.0 4.19205298013 0% => OK
Sentences with positive sentiment : 2.0 4.33554083885 46% => More positive sentences wanted.
Sentences with negative sentiment : 7.0 4.45695364238 157% => OK
Sentences with neutral sentiment: 1.0 4.27373068433 23% => More facts, knowledge or examples wanted.
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.199918701984 0.272083759551 73% => OK
Sentence topic coherence: 0.0801454934713 0.0996497079465 80% => OK
Sentence topic coherence SD: 0.0596932217241 0.0662205650399 90% => OK
Paragraph topic coherence: 0.112462041672 0.162205337803 69% => OK
Paragraph topic coherence SD: 0.057820635189 0.0443174109184 130% => OK
Essay readability:
automated_readability_index: 12.8 13.3589403974 96% => OK
flesch_reading_ease: 66.07 53.8541721854 123% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 9.5 11.0289183223 86% => OK
coleman_liau_index: 11.2 12.2367328918 92% => OK
dale_chall_readability_score: 8.0 8.42419426049 95% => OK
difficult_words: 46.0 63.6247240618 72% => More difficult words wanted.
linsear_write_formula: 10.5 10.7273730684 98% => OK
gunning_fog: 10.8 10.498013245 103% => OK
text_standard: 11.0 11.2008830022 98% => OK
What are above readability scores?
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Rates: 70.0 out of 100
Scores by essay e-grader: 21.0 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.