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 and that it poses a ser

Based on the given materials, the article as well as the lecture discuss zebra mussels, which are native Eastern Europe shellfish though they are distributing in some regions of North America. The author states that increasing population of these animals in target area may pose viable threats. That being said, the lecturer provides several ideas to repudiate this claim.
Initially, the author says that no one can stop the zebra mussel's moving from Europe to America, which can be done by new canals, owing to the fact that these fish can reach the destination by both living in ballast water and attaching bottom of the ship. If this phenomenon continues, the fish will settle the whole North America. However, the lecturer explains that this cannot be true because decision makers, as the people who worry about this occurrence, have more knowledge in compared to past; They can solve this problem by some ways to stop ships carrying the mussels. For instance, the ships can rake a time to refill their ballast water with salty ocean water, in which no zebra mussel can survive.
Secondly, the writer proclaims that since zebra mussels have a high rate of reproduction, they can control the new habitat and have huge effects on it, beside existing no predators for them. Yet again, the speaker underscores that there are lots of local birds in Europe which change their habit and eat a lot of zebra mussels. So, it can be predicted that these predators, which can eat huge amounts of birds as their diet, reduce the reproduction rate of mussels in America.
The final point of contention between the reading and listening passage is decreasing total fish population in new habitat by mussels. The author thinks that having existed in North America, the zebra mussels compete with other fishes for food, owing to the fact that they are plankton eaters. On the other hand, the speaker explains that zebra mussels have both negative and positive impacts in their new habitat. They can generate some nutrients which can be eaten by fishes in near bottom of lakes. So, more amounts of bottom-fish eating, the higher population of fishes.

Votes
Average: 8 (1 vote)
Essay Categories

Transition Words or Phrases used:
but, however, if, may, second, secondly, so, well, as to, for instance, as well as, on the other hand

Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments

Performance on Part of Speech:
To be verbs : 10.0 10.4613686534 96% => OK
Auxiliary verbs: 14.0 5.04856512141 277% => Less auxiliary verb wanted.
Conjunction : 6.0 7.30242825607 82% => OK
Relative clauses : 18.0 12.0772626932 149% => OK
Pronoun: 31.0 22.412803532 138% => Less pronouns wanted
Preposition: 47.0 30.3222958057 155% => OK
Nominalization: 9.0 5.01324503311 180% => OK

Performance on vocabulary words:
No of characters: 1790.0 1373.03311258 130% => OK
No of words: 361.0 270.72406181 133% => OK
Chars per words: 4.95844875346 5.08290768461 98% => OK
Fourth root words length: 4.35889894354 4.04702891845 108% => OK
Word Length SD: 2.35159988573 2.5805825403 91% => OK
Unique words: 189.0 145.348785872 130% => OK
Unique words percentage: 0.523545706371 0.540411800872 97% => OK
syllable_count: 552.6 419.366225166 132% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK

A sentence (or a clause, phrase) starts by:
Pronoun: 5.0 3.25607064018 154% => OK
Article: 14.0 8.23620309051 170% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 5.0 2.5761589404 194% => OK

Performance on sentences:
How many sentences: 15.0 13.0662251656 115% => OK
Sentence length: 24.0 21.2450331126 113% => OK
Sentence length SD: 56.334319518 49.2860985944 114% => OK
Chars per sentence: 119.333333333 110.228320801 108% => OK
Words per sentence: 24.0666666667 21.698381199 111% => OK
Discourse Markers: 6.73333333333 7.06452816374 95% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 0.0 4.19205298013 0% => OK
Sentences with positive sentiment : 4.0 4.33554083885 92% => OK
Sentences with negative sentiment : 4.0 4.45695364238 90% => OK
Sentences with neutral sentiment: 7.0 4.27373068433 164% => OK
What are sentences with positive/Negative/neutral sentiment?

Coherence and Cohesion:
Essay topic to essay body coherence: 0.188301818531 0.272083759551 69% => OK
Sentence topic coherence: 0.0663276348018 0.0996497079465 67% => OK
Sentence topic coherence SD: 0.0399836032119 0.0662205650399 60% => OK
Paragraph topic coherence: 0.120197084436 0.162205337803 74% => OK
Paragraph topic coherence SD: 0.0298443532593 0.0443174109184 67% => OK

Essay readability:
automated_readability_index: 14.0 13.3589403974 105% => OK
flesch_reading_ease: 55.58 53.8541721854 103% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 11.5 11.0289183223 104% => OK
coleman_liau_index: 11.78 12.2367328918 96% => OK
dale_chall_readability_score: 8.72 8.42419426049 104% => OK
difficult_words: 89.0 63.6247240618 140% => OK
linsear_write_formula: 14.0 10.7273730684 131% => OK
gunning_fog: 11.6 10.498013245 110% => OK
text_standard: 12.0 11.2008830022 107% => OK
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.