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 |
|---|---|---|---|
| Mon, 04/14/2014 - 14:02 | Ekhlass1980 | 80.00 | Check this speaking |
| Thu, 03/03/2016 - 21:17 | saramhl | 90.00 | Check this speaking |
| Mon, 04/14/2014 - 14:20 | Ekhlass1980 | 80.00 | Check this speaking |
| Fri, 11/08/2013 - 21:13 | Pinky123 | 85.00 | Check this speaking |
Speaking category
Speakings by user saramhl
:
- What discovery in the last 100 years has been most beneficial for people in your country? Use specific reasons and examples to support your choice. 80
- Some people believe that university students should be required to attend classes. Others believe that going to classes should be optional for students. Which point of view do you agree with? Use specific reasons and details to explain your answer. 93
- 19. In the future, students may have the choice of studying at home by using technology such as computers or television or of studying at traditional schools. Which would you prefer? Use reasons and specific details to explain your choice. 80
- practice test9-q3-2nd attempt 80
- Practice7-Q6As geologists, one of our major areas of concern is rocks. The best way to define a rock is as matter composed of one or more naturally occurring substances. They can be anything from a tiny grain of one mineral to a massive compound made up o 80
26 in 30
Great!