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 serious threat to freshwater fish populations in all of North America.
The reading and the lecture are both about the impact of zebra mussel on fish populations in North America. While the author of the reading states three reasons to argue that the invasion of zebra mussel to North America could not be prevented and it would result in a serious threat, the lecturer challenges each of these reasons.
To begin with, the lecturer points out that if ships required to empty what is called ''ballast water", where zebra mussel survives, in the ocean before entering North America borders, this would stop the invasion of the zebra mussel. By doing that, the zebra mussel spread could be controlled.
Secondly, the writer argues that zebra mussels could dominate the area they reached to. In the article, it is mentioned that there are no natural predators attacking zebra mussels in the new habitat, therefore, they will dominate the new area. The lecturer, however, rebuts this by stating that this case is true only at the beginning of the invasion. But after a while, natural predators will occur, such as birds, and they will feed on zebra mussels.
Lastly, the lecturer refutes the idea that zebra mussels present will lead to decreasing the overall fish population of the new habitat. Furthermore, he says that even if zebra mussel might have a negative effect on plankton eaters, they might make a positive impact on other species that do not eat plankton.
- Some parents forbid young children from owning smart phones (cell phones with Internet access), while others disagree and believe that they are important tools for keeping in touch. Which point of view do you think is better, and why? 73
- Do you agree or disagree with the following statement? People communicate with each other less than in the past because of the popularity of television. Use specific reasons and examples to support your opinion. 80
- A little over 2,200 years ago, the Roman navy attacked the Greek port city of Syracuse. According to some ancient historians, the Greeks defended themselves with an ingenious weapon called a “burning mirror”: a polished copper surface curved to focus 80
- Do you agree or disagree with the following statement?It is more important for governments to spend money to improve Internet access than to improve public transportation.Use specific reasons and examples to support your answer. 66
- Do you agree or disagree with the following statement?In twenty years, there will be fewer cars in use than there are today.Use specific reasons and examples to support your answer. 60
Grammar and spelling errors:
Line 13, column 233, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...ve a negative effect on plankton eaters, they might make a positive impact on oth...
^^
Transition Words or Phrases used:
but, furthermore, however, if, lastly, second, secondly, so, therefore, while, such as, to begin with
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 7.0 10.4613686534 67% => OK
Auxiliary verbs: 11.0 5.04856512141 218% => Less auxiliary verb wanted.
Conjunction : 4.0 7.30242825607 55% => More conjunction wanted.
Relative clauses : 10.0 12.0772626932 83% => OK
Pronoun: 20.0 22.412803532 89% => OK
Preposition: 30.0 30.3222958057 99% => OK
Nominalization: 1.0 5.01324503311 20% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1175.0 1373.03311258 86% => OK
No of words: 236.0 270.72406181 87% => More content wanted.
Chars per words: 4.97881355932 5.08290768461 98% => OK
Fourth root words length: 3.91947592106 4.04702891845 97% => OK
Word Length SD: 2.36746885736 2.5805825403 92% => OK
Unique words: 135.0 145.348785872 93% => More unique words wanted.
Unique words percentage: 0.572033898305 0.540411800872 106% => OK
syllable_count: 360.0 419.366225166 86% => 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: 7.0 8.23620309051 85% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 2.0 1.51434878587 132% => OK
Preposition: 4.0 2.5761589404 155% => OK
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: 23.0 21.2450331126 108% => OK
Sentence length SD: 55.4530431987 49.2860985944 113% => OK
Chars per sentence: 117.5 110.228320801 107% => OK
Words per sentence: 23.6 21.698381199 109% => OK
Discourse Markers: 10.1 7.06452816374 143% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 2.0 4.33554083885 46% => More positive sentences wanted.
Sentences with negative sentiment : 5.0 4.45695364238 112% => OK
Sentences with neutral sentiment: 3.0 4.27373068433 70% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.233761539188 0.272083759551 86% => OK
Sentence topic coherence: 0.100272816233 0.0996497079465 101% => OK
Sentence topic coherence SD: 0.0545444729391 0.0662205650399 82% => OK
Paragraph topic coherence: 0.149518834798 0.162205337803 92% => OK
Paragraph topic coherence SD: 0.0648104225854 0.0443174109184 146% => OK
Essay readability:
automated_readability_index: 13.8 13.3589403974 103% => OK
flesch_reading_ease: 56.59 53.8541721854 105% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 11.1 11.0289183223 101% => OK
coleman_liau_index: 11.9 12.2367328918 97% => OK
dale_chall_readability_score: 8.93 8.42419426049 106% => OK
difficult_words: 62.0 63.6247240618 97% => OK
linsear_write_formula: 14.0 10.7273730684 131% => OK
gunning_fog: 11.2 10.498013245 107% => OK
text_standard: 14.0 11.2008830022 125% => OK
What are above readability scores?
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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.