Speaking topics in text
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 bio-luminescence 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.
Online speaking recording
Votes
This speaking topic by users
Post dates | Users | rates | Contents |
---|---|---|---|
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 |
2013-11-08 | Pinky123 | 85.00 | Check this speaking |
Speaking category
Speakings by user Ekhlass1980
:
- Listening In nature, warm-blooded animals such as mammals and birds need to keep their internal temperatures within a certain range. For most mammals this range is from about 36 to 38 degrees Celsius. Thermoregulation is responsible for maintaining this i 80
- What job or career do you admire most, but not want for yourself? Use specific reasons and examples to support your answer 80
- Describe your ideal job. Discuss why you consider this your ideal job. Use specific reasons and examples to support your answer. 57
- Q6 80
- q3 80
23 in 30
Not good for last 15 seconds.