QUESTION
Summarize the points in the lecture, being sure to explain how they address the specific ideas about bioluminescence described in the reading passage.
READING PASSAGE
There are creatures that utilize a unique biological function known as bioluminescence, or glowing in the dark. They have the ability to illuminate their bodies. Some scientists believe they use this feature to communicate. However, others believe it’s being used for hunting and attracting prey. Finally other scientists believe creatures use bioluminescence for camouflage and defense. Despite the theories, many mysteries exist concerning bioluminescence.
The first feature scientists noticed for bioluminescence is communication. Certain animals such as fireflies use colors and patterns to communicate with each other. By using light to communicate these animals express themselves over long distances in complete silence. Many believe that when animals use bioluminescence for communication the primary use is for mating. The light works the same way that bird plumage or animal calls attract mates.
On a different note, some animals use bioluminescence for hunting. Some animals use the light the way people use night vision goggles or flashlights. The light allows creatures to see in dark areas and hunt. Some animals use bioluminescence as an attraction to draw animals closer. Attracted by the light, some animals become easy prey for bioluminescent animals.
A complimentary idea to bioluminescence for hunting is for defense. Certain fish have been able to generate light to their advantage by glowing to blur their outline and make them a harder target for prey. Other animals release glowing light as an inky residue when they are attacked to distract their predator while they escape. Thus they use bioluminescence for defense.
All in all, the role of bioluminescence is more varied than other biological functions. Through this act of glowing, creatures communicate their needs and desires. Other animals are capable of hunting with greater ease, while others use their glowing as a means of defense and camouflage. Through tracking these varying uses scientists have been able to gain greater understanding of bioluminescence.
LECTURE AUDIO
