托福new tpo 5听力lecture11 Listen to a talk in a biology class.原文解析+翻译音频

[00:00.00](N) Listen to a talk in a biology class.
[00:01.00](W-Cn) Today, we're discussing the fascinating phenomenon of bioluminescence, the ability of certain organisms to produce light. This trait is found across a variety of species, including bacteria, fungi, and animals like jellyfish and fireflies. Bioluminescence occurs through a chemical reaction that involves the enzyme luciferase, which interacts with a molecule called luciferin. When oxygen is introduced into this reaction, light is produced.
[00:02.00]This light can serve multiple purposes depending on the organism. For instance, deep-sea fish use bioluminescence to attract prey or communicate with potential mates in the dark ocean depths. Fireflies, on the other hand, use their glow primarily for mating signals. Interestingly, the color of bioluminescent light can vary between species—some emit blue, while others glow green or even red. Researchers have found that the specific wavelengths of light produced can be crucial for the organism’s survival and interaction within its environment.
[00:03.00]In addition to biological functions, bioluminescence has attracted scientific interest for its potential applications. Medical researchers, for example, are exploring ways to use bioluminescent markers in imaging techniques. This could one day help in tracking processes like the spread of cancer cells or the effectiveness of a drug. The study of bioluminescence not only illuminates the wonders of nature but also opens doors to innovative scientific advancements.