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 |
---|---|---|---|
2014-04-14 | Ekhlass1980 | 80.00 | Check this speaking |
2014-04-14 | Ekhlass1980 | 80.00 | Check this speaking |
2016-03-03 | saramhl | 90.00 | Check this speaking |
2013-11-08 | Pinky123 | 85.00 | Check this speaking |
Speaking category
Speakings by user saramhl
:
- Learning about the past has no value for those of us living in the present. Do you agree or disagree? Use specific reasons and examples to support your answer. 80
- practice9-q5 90
- practice7-q4Confirmation Bias Scientists regularly test theories and ideas by subjecting them to extensive experimentation. The results of such experiments are then analyzed to support, refute, or modify previously held ideas. When scientists discover tha 77
- Some universities require students to take classes in many subjects. Other universities require students to specialize in one subject. Which is better? 80
- Do you agree or disagree with the following statement? It is more important for students to learn ideas and concepts than it is for them to learn facts. Use specific reasons and examples to support your answer. 60
26 in 30
Great!