The article discusses the threats of the zebra mussel; a freshwater shellfish; could cause upon freshwater fish populations in North America, and provides three supports. The professor, however, indicates that it is not proven that they are a real threat to other species, and he refutes each of the author's reasons.
First, the article states that the zebra mussels are unstoppable from spreading. The professor explains that it is true that in the past it was hard to control the zebra mussel from spreading; since they attach themselves to ships' bottom and travel through the ocean, But it is clear now that ocean's salty water could easily kill the zebra mussel.
Second, the article claims that zebra mussels could dominate new habitats. The professor disagrees and states that when they spread; local birds could easily change their diet and become zebra's new predators and hunt them, and preventing them from further spreading.
Finally, the author says that zebra mussels could cause a decline in the overall fish population in habitats where they become dominant. The professor refutes this point as well and explains that if the zebras become dominant, it is highly unlikely that they cause the overall fish population to decline, because on the one hand, it is true that they eat fishes that eat plankton, but on the other hand, the could increase bottom fishes population grow higher.
Transition Words or Phrases used:
but, finally, first, however, if, second, so, well, it is true, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 8.0 10.4613686534 76% => OK
Auxiliary verbs: 6.0 5.04856512141 119% => OK
Conjunction : 10.0 7.30242825607 137% => OK
Relative clauses : 15.0 12.0772626932 124% => OK
Pronoun: 31.0 22.412803532 138% => Less pronouns wanted
Preposition: 19.0 30.3222958057 63% => OK
Nominalization: 3.0 5.01324503311 60% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1177.0 1373.03311258 86% => OK
No of words: 230.0 270.72406181 85% => More content wanted.
Chars per words: 5.11739130435 5.08290768461 101% => OK
Fourth root words length: 3.89432290496 4.04702891845 96% => OK
Word Length SD: 2.36299847963 2.5805825403 92% => OK
Unique words: 123.0 145.348785872 85% => More unique words wanted.
Unique words percentage: 0.534782608696 0.540411800872 99% => OK
syllable_count: 343.8 419.366225166 82% => 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: 10.0 8.23620309051 121% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 5.0 1.51434878587 330% => Less conjunction wanted as sentence beginning.
Preposition: 1.0 2.5761589404 39% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 8.0 13.0662251656 61% => 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: 28.0 21.2450331126 132% => The Avg. Sentence Length is relatively long.
Sentence length SD: 80.688347207 49.2860985944 164% => OK
Chars per sentence: 147.125 110.228320801 133% => OK
Words per sentence: 28.75 21.698381199 132% => OK
Discourse Markers: 10.125 7.06452816374 143% => 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 : 4.0 4.45695364238 90% => OK
Sentences with neutral sentiment: 2.0 4.27373068433 47% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.401529191845 0.272083759551 148% => OK
Sentence topic coherence: 0.198058038154 0.0996497079465 199% => OK
Sentence topic coherence SD: 0.078512593256 0.0662205650399 119% => OK
Paragraph topic coherence: 0.246856905848 0.162205337803 152% => OK
Paragraph topic coherence SD: 0.0310944939711 0.0443174109184 70% => OK
Essay readability:
automated_readability_index: 17.1 13.3589403974 128% => OK
flesch_reading_ease: 51.52 53.8541721854 96% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 13.0 11.0289183223 118% => OK
coleman_liau_index: 13.01 12.2367328918 106% => OK
dale_chall_readability_score: 8.94 8.42419426049 106% => OK
difficult_words: 57.0 63.6247240618 90% => OK
linsear_write_formula: 13.5 10.7273730684 126% => OK
gunning_fog: 13.2 10.498013245 126% => OK
text_standard: 14.0 11.2008830022 125% => OK
What are above readability scores?
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Rates: 85.0 out of 100
Scores by essay e-grader: 25.5 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.