Using the examples of the eel and the angler fish, explain two types of adaptations that help animals survive in the deepest parts of the ocean.
. A lot of plants and animals live near the surface of the ocean and that means there's a lot of food near the surface, because there are lots of plants and animals to eat.
2. But if you go down to the deepest parts of the ocean, it's cold and dark.
3. And there is not a lot living down there.
4. So food there is very scarce.
5. So organisms that live down at these great depths have developed special adaptations to help them survive in this environment where food is so hard to find.
6. For example, many deep-sea organisms have body features that enable them to eat prey that are larger than themselves.
7. A good example, um, there is a species of eel that has an enormous mouth and a large stomach that's capable of expanding and these unusual features allow this ell to eat prey larger than itself.
8. That's a big advantage because if the ell eats something big, that's a lot of food, a lot of nutrition.
9. So the ell can go for quite a while before it has to find food again.
10. Another helpful adaptation in some deep-sea organisms is the ability to generate light.
11. And some organisms use that light to help them capture food.
12. For example, there is a kind of fish called the angler fish, and on its head this fish has a little structure that produces light that glows in the dark.
13. This little structure, this little light is positioned close to the fish's mouth.
14. Other fish are attracted to this light.
15. They think it is something small they can eat.
16. So they swim straight toward it and that brings them close enough for the angle fish to capture them and eat them.
| Post dates | Users | rates | Contents |
|---|---|---|---|
| 2019-12-29 | bishoy | 90.00 | Check this speaking |
| 2018-09-30 | chandr | 90.00 | Check this speaking |
| 2019-12-29 | bishoy | 83.00 | Check this speaking |
| 2018-06-07 | Elena Cristina | 90.00 | Check this speaking |
| 2018-04-09 | Elena Cristina | 63.00 | Check this speaking |
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Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on vocabulary words:
No of characters: 745.0 578.828451883 129% => OK
No of words: 177.0 151.265690377 117% => OK
Chars per words: 4.20903954802 3.82278263415 110% => OK
Fourth root words length: 3.64748333727 3.50058242952 104% => OK
Word Length SD: 2.12765691226 1.80425224433 118% => OK
Unique words: 114.0 92.4686192469 123% => OK
Unique words percentage: 0.64406779661 0.61298525976 105% => OK
Syllable count: 234.0 182.283891213 128% => OK
Avg_syllables_per_word: 1.3 1.20543933054 108% => OK
Performance on coherence:
Topic speech coherence ratio: 0.0882284652891 0.0839705835288 105% => OK
Acoustic performance on paragraphs:
How many acoustic paragraphs: 2.0 4.47071129707 45% => OK
Average paragraph length: 88.5 65.8948926009 134% => OK
STD paragraph length: 35.5 19.7758100068 180% => OK
Average paragraph duration: 29.335 25.5208953607 115% => OK
STD paragraph duration: 12.365 7.49434385956 165% => OK
Acoustic performance on sentences:
How many acoustic sentences: 34.0 42.9832635983 79% => OK
Average acoustic sentence length: 5.20588235294 3.78147595546 138% => OK
STD acoustic sentence length: 4.16412840795 2.94285465224 141% => OK
Average acoustic sentences duration: 1.61176470588 1.39386743896 116% => OK
STD acoustic sentences duration: 1.22096507294 0.967747756167 126% => OK
Acoustic performance on acoustic silence:(An acoustic silence means a little pause between two or more words)
How many acoustic silence: 32.0 40.4456066946 79% => OK
Total acoustic silence duration: 8.24 7.59280334728 109% => OK
Average acoustic silence duration: 0.2575 0.19053887516 135% => Maybe the pauses are too long.
STD acoustic silence duration: 0.242603070879 0.157467062838 154% => The duration of acoustic silence changes often. It may have hesitations.
Acoustic performance on acoustic words:
Total word duration: 45.16 46.3453556485 97% => OK
Average word duration: 0.255141242938 0.308780311121 83% => OK
STD word duration: 0.141641336431 0.201157623399 70% => OK
Disfluencies: like hesitations, or 'ehn' or taking a long time to pronounce a word:
How many disfluencies: 2.0 8.09623430962 25% => Good job, the lower, the better.
Total_disfluencies_duration: 1.35 6.56692468619 21% => Good job. The lower, the better.
Total acoustic noise duration: 3.08 3.53066945607 87% => OK
Acoustic rates:
Total speech duration: 58.67 59.5455230126 99% => OK
Compare to expected duration: 0.977833333333 0.992425383543 99% => OK
Rate of silence: 0.54542355548 0.681803438845 80% => OK
Rate of speech: 3.01687404125 2.53813033465 119% => OK
Rate of speech by unique words: 1.9430714164 1.55221717717 125% => OK
Rate of word duration by unique words: 2.5243578388 1.99939622689 126% => OK
Average articulation rates: 0.272147943503 0.309613076454 88% => OK
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Rates: 90.0 out of 100
Scores by speech e-grader: 27.0 Out of 30
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Note: the speech e-grader does NOT examine the meaning of words and ideas.