Speaking topics in text
Reading
Bioluminescence
Bioluminescence occurs when organisms convert chemical energy into visible light. This happens when a chemical reaction involving oxygen and two other molecules takes place. During this reaction, light of varying colors may be emitted. The great majority of organisms that use bioluminescence are found deep in the oceans depths. This ability to produce light serves a variety of functions. Organisms may use it to do anything from escape their predators to find food.
Question
Using points and examples made in the lecture, explain what bioluminescence is and how animals may use it.
Online speaking recording
Votes
This speaking topic by users
Post dates | Users | rates | Contents |
---|---|---|---|
2013-11-08 | Pinky123 | 85.00 | Check this speaking |
2016-03-03 | saramhl | 90.00 | Check this speaking |
2014-04-14 | Ekhlass1980 | 80.00 | Check this speaking |
2014-04-14 | Ekhlass1980 | 80.00 | Check this speaking |
Speaking category
Speakings by user saramhl
:
- 16. Every generation of people is different in important ways. How is your generation different from your parents’ generation? Use specific reasons and examples to explain your answer. 90
- Small or big11. Some people prefer to live in a small town. Others prefer to live in a big city. Which place would you prefer to live in? Use specific reasons and details to support your answer. 80
- q4-evolution in action 90
- PRACTICE6-Q6 80
- q2-Indoor activities vs. Outdoor activities
26 in 30
Great!