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 SNorth America. There are reasons to believe that this invasion cannot be stopped and that it poses a serious threat to freshwater fish populations in all of North America.
First, the history of the zebra mussel's spread suggests that the invasion might be unstoppable. It is a prime example of an invasion made possible by human transportation. From the zebra mussels original habitats in Eastern Europe, ships helped spread it out along new canals built to connect Europe’s waterways. The mussel can attach itself to a ship’ s bottom or can survive in the water - called "ballast water” - that the ship needs to take on to properly balance its cargo. By the early nineteenth century, the mussel had spread to the whole of Europe. It was later carried to the east coast of North America in the ballast water of ships traveling from Europe. The way ships have spread the zebra mussel in the past strongly suggests that the species will soon colonize all of North America.
Moreover, once zebra mussels are carried to a new habitat, they can dominate it. They are a hardy species that does well under a variety of conditions, and they have a high rate of reproduction. Most important, however, zebra mussels often have no predators in their new habitats, and species without natural predators are likely to dominate their habitats.
Finally, zebra mussels are likely to cause a decline in the overall fish population in habitats where they become dominant. The mussels are plankton eaters, which means that they compete for food with many freshwater fish species.
Recently there has been a debate on zebra mussel, a shell fish indigeneous to Europe that has spread to some part of North America.More specifically, in regard to the passage, the writer puts forth three reasons on how the intrusion can never be put to an end.In the listening passage, the lecturer is quick to point out that there are some serious flaws in the writers claim.In fact, he believes, and addresses in detail, three effective means by which the rapid spread of the Zebra mussel can be controlled.
First and foremost, the author of the reading states that zebra mussel adheres ballast water and as a result, it will maintain its balance to cargo.Some professionals in the same field, however, stand in firm opposition to this claim.In the listening for example, the professor states that Zebra mussel carries ballast water to europe and in turn deposit it to North America.Besides, salt water totally eliminates zebra mussel.
One group of scholars, represented by the writer, thinks that movement of zebra mussels to a new dwelling place will automatically make them have a greater influence.Of course, though, not all experts in the field believe this is accurate.Again, the speaker addresses this point when he states that zebra mussel do not come across predators at first, but as a matter of fact, they have natural enemies because aquatic birds eat a lot of them.
Finally, the author brings his argument to a close by suggesting that zebra mussels are prone to reducing the overall fish population.Not surprisingly, the lecturer takes issue with the claim by contending that the total population would be reduced, but these clearly have both setbacks and benefits on fish planting.To be specific, there are nutrients are the bottom so fish at the bottom are more likely to generate numerous nutrients.
To sum up, both the author and writer hold conflicting views on the spread of zebra mussel.It is clear that they will have trouble finding common grounds.
Grammar and spelling errors:
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...n a debate on zebra mussel, a shell fish indigeneous to Europe that has spread t...
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...ell fish indigeneous to Europe that has spread to some part of North America.Mo...
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...ndigeneous to Europe that has spread to some part of North America.More specific...
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... spread to some part of North America.More specifically, in regard to the passage,...
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...the passage, the writer puts forth three reasons on how the intrusion can never b...
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...he intrusion can never be put to an end.In the listening passage, the lecturer is ...
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Transition Words or Phrases used:
besides, but, finally, first, however, if, so, well, for example, in fact, of course, as a matter of fact, as a result, in regard to, to sum up
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 : 8.0 7.30242825607 110% => OK
Relative clauses : 11.0 12.0772626932 91% => OK
Pronoun: 24.0 22.412803532 107% => OK
Preposition: 47.0 30.3222958057 155% => OK
Nominalization: 7.0 5.01324503311 140% => OK
Performance on vocabulary words:
No of characters: 1671.0 1373.03311258 122% => OK
No of words: 329.0 270.72406181 122% => OK
Chars per words: 5.07902735562 5.08290768461 100% => OK
Fourth root words length: 4.25891501996 4.04702891845 105% => OK
Word Length SD: 2.74332569453 2.5805825403 106% => OK
Unique words: 188.0 145.348785872 129% => OK
Unique words percentage: 0.571428571429 0.540411800872 106% => OK
syllable_count: 509.4 419.366225166 121% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 4.0 3.25607064018 123% => OK
Article: 8.0 8.23620309051 97% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 3.0 1.51434878587 198% => OK
Preposition: 7.0 2.5761589404 272% => Less preposition wanted as sentence beginnings.
Performance on sentences:
How many sentences: 5.0 13.0662251656 38% => 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: 65.0 21.2450331126 306% => The Avg. Sentence Length is relatively long.
Sentence length SD: 124.174715623 49.2860985944 252% => The lengths of sentences changed so frequently.
Chars per sentence: 334.2 110.228320801 303% => Less chars_per_sentence wanted.
Words per sentence: 65.8 21.698381199 303% => Less words per sentence wanted.
Discourse Markers: 28.6 7.06452816374 405% => Less transition words/phrases wanted.
Paragraphs: 5.0 4.09492273731 122% => OK
Language errors: 16.0 4.19205298013 382% => Less language errors wanted.
Sentences with positive sentiment : 2.0 4.33554083885 46% => More positive sentences wanted.
Sentences with negative sentiment : 2.0 4.45695364238 45% => More negative sentences wanted.
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: 0.20301697931 0.272083759551 75% => OK
Sentence topic coherence: 0.106173318104 0.0996497079465 107% => OK
Sentence topic coherence SD: 0.0405577587961 0.0662205650399 61% => OK
Paragraph topic coherence: 0.106173318104 0.162205337803 65% => OK
Paragraph topic coherence SD: 0.0405577587961 0.0443174109184 92% => OK
Essay readability:
automated_readability_index: 35.4 13.3589403974 265% => Automated_readability_index is high.
flesch_reading_ease: 13.96 53.8541721854 26% => Flesch_reading_ease is low.
smog_index: 11.2 5.55761589404 202% => Smog_index is high.
flesch_kincaid_grade: 27.5 11.0289183223 249% => Flesch kincaid grade is high.
coleman_liau_index: 13.07 12.2367328918 107% => OK
dale_chall_readability_score: 10.99 8.42419426049 130% => OK
difficult_words: 86.0 63.6247240618 135% => OK
linsear_write_formula: 27.0 10.7273730684 252% => Linsear_write_formula is high.
gunning_fog: 28.0 10.498013245 267% => Gunning_fog is high.
text_standard: 28.0 11.2008830022 250% => The average readability is very high. Good job!
What are above readability scores?
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Write the essay in 20 minutes.
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.