Using points from the lecture, explain how the passion plant and the potato plant defend themselves from insects
1. We all know that insects like to eat plants.
2. But some plants have been able to…to develop ways to protect themselves from insects.
3. Today I'm gonna talk about some ways plants defend themselves.
4. Now, some plants have physical features that prevent insects from landing on them, like the passion plant for example.
5. Its leaves have little spiky hairs all over them.
6. They are like spikes, sticking out of the plant that are so numerous and dense that they prevent insects from landing on the leaves.
7. Basically there's just no room for the insect to land.
8. And since insects can't land on the leaves they can't eat them.
9. So the little hairs serve as a physical feature that helps protect the passion plant from insects.
10. All right!
11. But other plants protect themselves using chemical defenses, like the potato plant.
12. The potato plant's able to release a chemical throughout its leaf system whenever an insect attacks it, starts eating leaf.
13. So, say an insect starts eating a potato plant's leaf.
14. That will cause the plant to react by releasing a chemical throughout its leaf system.
15. The insect swallows this chemical as it eats.
16. And this chemical discourages the insect from wanting to eat any more of the plant.
17. How?
18. Well, the substance makes the insect feel full, like it's already had enough to eat.
19. The insect no longer feels hungry.
20. So it stops eating the plant.
21. So, by emitting this chemical, the potato plant protects itself from insects.
| Post dates | Users | rates | Contents |
|---|---|---|---|
| 2019-11-08 | Seema Modak | 66.00 | Check this speaking |
| 2018-08-09 | Taniazehra | 70.00 | Check this speaking |
| 2018-06-07 | Elena Cristina | 80.00 | Check this speaking |
| 2018-08-30 | chandr | 95.00 | Check this speaking |
| 2019-08-29 | bishoy | 83.00 | Check this speaking |
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Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on vocabulary words:
No of characters: 747.0 578.828451883 129% => OK
No of words: 193.0 151.265690377 128% => OK
Chars per words: 3.87046632124 3.82278263415 101% => OK
Fourth root words length: 3.72725689877 3.50058242952 106% => OK
Word Length SD: 1.77454899478 1.80425224433 98% => OK
Unique words: 116.0 92.4686192469 125% => OK
Unique words percentage: 0.60103626943 0.61298525976 98% => OK
Syllable count: 236.7 182.283891213 130% => OK
Avg_syllables_per_word: 1.2 1.20543933054 100% => OK
Performance on coherence:
Topic speech coherence ratio: 0.0823337355384 0.0839705835288 98% => OK
Acoustic performance on paragraphs:
How many acoustic paragraphs: 4.0 4.47071129707 89% => OK
Average paragraph length: 51.0 65.8948926009 77% => OK
STD paragraph length: 40.4042077017 19.7758100068 204% => Paragraph length changes often.
Average paragraph duration: 14.5125 25.5208953607 57% => OK
STD paragraph duration: 11.0404967619 7.49434385956 147% => OK
Acoustic performance on sentences:
How many acoustic sentences: 32.0 42.9832635983 74% => OK
Average acoustic sentence length: 6.03125 3.78147595546 159% => OK
STD acoustic sentence length: 4.75975560691 2.94285465224 162% => OK
Average acoustic sentences duration: 1.6625 1.39386743896 119% => OK
STD acoustic sentences duration: 1.21126483479 0.967747756167 125% => OK
Acoustic performance on acoustic silence:(An acoustic silence means a little pause between two or more words)
How many acoustic silence: 31.0 40.4456066946 77% => OK
Total acoustic silence duration: 5.22 7.59280334728 69% => OK
Average acoustic silence duration: 0.168387096774 0.19053887516 88% => OK
STD acoustic silence duration: 0.142943633696 0.157467062838 91% => OK
Acoustic performance on acoustic words:
Total word duration: 45.69 46.3453556485 99% => OK
Average word duration: 0.236735751295 0.308780311121 77% => Maybe the speed rate is very high.
STD word duration: 0.122707865795 0.201157623399 61% => OK
Disfluencies: like hesitations, or 'ehn' or taking a long time to pronounce a word:
How many disfluencies: 1.0 8.09623430962 12% => Good job, the lower, the better.
Total_disfluencies_duration: 0.77 6.56692468619 12% => Good job. The lower, the better.
Total acoustic noise duration: 2.03 3.53066945607 57% => OK
Acoustic rates:
Total speech duration: 58.05 59.5455230126 97% => Talk more. Do not save time. People can talk 4-5 words in one second.
Compare to expected duration: 0.9675 0.992425383543 97% => OK
Rate of silence: 0.534022394488 0.681803438845 78% => OK
Rate of speech: 3.32472006891 2.53813033465 131% => OK
Rate of speech by unique words: 1.99827734711 1.55221717717 129% => OK
Rate of word duration by unique words: 2.53884876341 1.99939622689 127% => OK
Average articulation rates: 0.306578497409 0.309613076454 99% => 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.