Archaeologists have recently found a fossil of a 150-million-year-old mammal
known as Repenornamus robustus (R. robustus). Interestingly, the mammal's
stomach contained the remains of a psittacosaur dinosaur. Some researchers have
therefore suggested that R. robustus was an active hunter of dinosaurs. However,
a closer analysis has made the hypothesis that R. robustus was an active hunter
unlikely. It was probably Just a scavenger that sometimes fed on dinosaur eggs
containing unhatched dinosaurs.
First, R. robustus, like most mammals living 150 million years ago, was small—
only about the size of a domestic cat. It was much smaller than psittacosaurs,
which were almost two meters tall when full grown. Given this size difference, it is
unlikely that R. robustus would have been able to successfully hunt psittacosaurs
or similar dinosaurs.
Second, the legs of R. robustus appear much more suited for scavenging
than hunting: they were short and positioned somewhat to the side rather than
directly underneath the animal. These features suggest that R. robustus did not
chase after prey. Psittacosaurs—the type of dinosaur found in the stomach of
R. robustus—were fast moving. It is unlikely that they would have been caught by
such short-legged animals.
Third, the dinosaur bones inside the stomach of the R. robustus provide no
evidence to support the idea that the dinosaur had been actively hunted. When
an animal has been hunted and eaten by another animal, there are usually teeth
marks on the bones of the animal that was eaten. But the bones of the psittacosaur
inside the R. robustus stomach do not have teeth marks. This suggests that
R. robustus found an unguarded dinosaur nest with eggs and simply swallowed an
egg with the small psittacosaur still inside the eggshell.
The professor in the lecture tried to introduce a different point of view than the reading passage about whether the R.robustus was an active hunter or not. While the reading passage holds that the R.robustus was only a scavenger, the lecture argues that it must have been an active hunter.
To begin with, the reading passage claims that the R.robustus was too small to be an active hunter. However, the lecture states that the R.robustus was twice the mass the dinosaur fossil we found inside its stomach and this exactly matches the predator prey size ratio we see today. Of course, it was not possible that the R.robustus hunted and fed on full-grown dinosaurs which was far bigger than its size but it's quite possible that it could have hunted baby dinosaurs where the difference in size, the R.robustus being bigger, gave it a leg up over the baby dinosaurs.
In addition, the reading passage holds the opinion that the R.robustus wasn't fast enough because it had short legs and they were positioned somewhat to the side rather than underneath the animal. this wouldn't allow the R.robustus to chase and hunt a fast-moving dinosaur like the Psittacosaurs. In contrast, the lecture illustrates that this couldn't be true especially if we consider the modern-day animals like the Tasmanian Devil which even though it has almost the same leg design, it can reach speeds of fifteen kilometers per hour which apparently would have been enough for the R.robustus to be an active hunter during the dinosaurs age.
Furthermore, the lecture refutes the claim from the reading passage that the absence of teeth marks on the fossil recovered from inside the R.robustus' stomach proves that it was just an egg scavenger not an active hunter. Mentioned in the lecture, The way the R.robustus consumed meat was a bit different because it used to swallow its prey in whole or in big pieces without chewing and the evidence for this is the absence of wear on its back teeth from different specimen. As a result, teeth marks are not expected to be on the bones of its preys
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Grammar and spelling errors:
Line 3, column 574, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...ve it a leg up over the baby dinosaurs. In addition, the reading passage holds t...
^^^^^
Line 5, column 72, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: wasn't
...e holds the opinion that the R.robustus wasnt fast enough because it had short legs a...
^^^^^
Line 5, column 197, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: This
...side rather than underneath the animal. this wouldnt allow the R.robustus to chase a...
^^^^
Line 5, column 202, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: wouldn't
...rather than underneath the animal. this wouldnt allow the R.robustus to chase and hunt ...
^^^^^^^
Line 5, column 343, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: couldn't
...rast, the lecture illustrates that this couldnt be true especially if we consider the m...
^^^^^^^
Line 7, column 549, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...expected to be on the bones of its preys
^^^^^^^
Transition Words or Phrases used:
apparently, but, furthermore, however, if, so, while, as to, in addition, in contrast, of course, as a result, to begin with
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 18.0 10.4613686534 172% => OK
Auxiliary verbs: 4.0 5.04856512141 79% => OK
Conjunction : 8.0 7.30242825607 110% => OK
Relative clauses : 14.0 12.0772626932 116% => OK
Pronoun: 33.0 22.412803532 147% => Less pronouns wanted
Preposition: 39.0 30.3222958057 129% => OK
Nominalization: 5.0 5.01324503311 100% => OK
Performance on vocabulary words:
No of characters: 1717.0 1373.03311258 125% => OK
No of words: 354.0 270.72406181 131% => OK
Chars per words: 4.85028248588 5.08290768461 95% => OK
Fourth root words length: 4.33761313653 4.04702891845 107% => OK
Word Length SD: 2.50102759053 2.5805825403 97% => OK
Unique words: 176.0 145.348785872 121% => OK
Unique words percentage: 0.497175141243 0.540411800872 92% => More unique words wanted or less content wanted.
syllable_count: 529.2 419.366225166 126% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 3.0 3.25607064018 92% => OK
Article: 9.0 8.23620309051 109% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 4.0 2.5761589404 155% => OK
Performance on sentences:
How many sentences: 11.0 13.0662251656 84% => 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: 32.0 21.2450331126 151% => The Avg. Sentence Length is relatively long.
Sentence length SD: 82.1982083415 49.2860985944 167% => OK
Chars per sentence: 156.090909091 110.228320801 142% => OK
Words per sentence: 32.1818181818 21.698381199 148% => OK
Discourse Markers: 11.2727272727 7.06452816374 160% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 6.0 4.19205298013 143% => OK
Sentences with positive sentiment : 4.0 4.33554083885 92% => OK
Sentences with negative sentiment : 2.0 4.45695364238 45% => More negative sentences wanted.
Sentences with neutral sentiment: 5.0 4.27373068433 117% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.133513913498 0.272083759551 49% => OK
Sentence topic coherence: 0.0612312452209 0.0996497079465 61% => OK
Sentence topic coherence SD: 0.0299456056417 0.0662205650399 45% => Sentences are similar to each other.
Paragraph topic coherence: 0.0887409676746 0.162205337803 55% => OK
Paragraph topic coherence SD: 0.0310389394889 0.0443174109184 70% => OK
Essay readability:
automated_readability_index: 17.5 13.3589403974 131% => OK
flesch_reading_ease: 47.46 53.8541721854 88% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 14.6 11.0289183223 132% => OK
coleman_liau_index: 11.44 12.2367328918 93% => OK
dale_chall_readability_score: 7.99 8.42419426049 95% => OK
difficult_words: 62.0 63.6247240618 97% => OK
linsear_write_formula: 12.5 10.7273730684 117% => OK
gunning_fog: 14.8 10.498013245 141% => OK
text_standard: 15.0 11.2008830022 134% => OK
What are above readability scores?
---------------------
Write the essay in 20 minutes.
Rates: 73.3333333333 out of 100
Scores by essay e-grader: 22.0 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.