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Listen to an Announcement Test #104
Listen to an Announcement
1. What is the main topic of the talk?
A) The evolution of marine life
B) The chemistry of fireflies
C) The properties of 'cold light'
D) The phenomenon of bioluminescence
2. What is a key characteristic of bioluminescence?
A) It is only found in insects.
B) It produces very little heat.
C) It requires sunlight to function.
D) It is a form of thermal radiation.
Professor: Good afternoon. Today we're going to dive into a fascinating biological phenomenon: bioluminescence. This is the production and emission of light by a living organism. It's a form of chemiluminescence. Unlike a lightbulb, which produces a lot of heat, bioluminescence is 'cold light,' meaning it generates very little thermal radiation. We see it most commonly in marine organisms, but also in some fungi and insects, like fireflies. We'll be exploring its chemical mechanisms and its evolutionary advantages.
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| ID: | #io1338328635 |
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