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Read an Academic Passage Test #367

Read an Academic Passage

Bioluminescence in Deep-Sea Creatures

Bioluminescence, the production of light by a living organism, is one of the most fascinating phenomena in the natural world. While it exists in some land species, it is most common in the deep ocean, an environment of perpetual darkness. The light is generated through a chemical reaction, typically involving a substance called luciferin and an enzyme, luciferase. This biological light can appear in various colors, including blue, green, and yellow, depending on the specific chemicals and organism involved.

The functions of this self-generated light are incredibly diverse and essential for survival in the deep sea. Some creatures, like the anglerfish, use a luminous lure to attract unsuspecting prey in the dark. Others use flashes of light to startle and confuse predators, allowing for a quick escape. Bioluminescence also plays a role in communication and mating, with specific patterns of light used to signal and identify potential partners. The sheer versatility of its applications makes it a key evolutionary adaptation.

Beyond its importance in nature, bioluminescence is of great interest to science and technology. Researchers are studying the chemical processes to develop new tools for medical imaging, using bioluminescent proteins to tag and track cells within the body. Furthermore, these natural lights are being explored as potential sensors to detect pollutants in the environment. Studying how life creates its own light provides valuable insights that could lead to innovative human technologies.

1. What is the main topic of the passage?
A) The chemical composition of luciferin
B) The variety of life in the deep ocean
C) The evolution of the anglerfish
D) The functions and importance of bioluminescence
2. The word "versatility" in the passage is closest in meaning to
A) complexity
B) rarity
C) ability to be used in many ways
D) need for a specific environment
3. What can be inferred about organisms living in the upper levels of the ocean compared to the deep sea?
A) They are more likely to use bioluminescence for hunting.
B) They have less need for bioluminescence as a light source.
C) They produce brighter and more colorful light.
D) They are of greater interest to medical researchers.
4. According to the passage, how does the anglerfish use bioluminescence?
A) To communicate with other anglerfish
B) To defend itself against predators
C) To attract creatures it intends to eat
D) To help it navigate in the dark
5. What is the purpose of the third paragraph?
A) To question the theories presented in the second paragraph
B) To provide examples of bioluminescent land animals
C) To describe the scientific and technological applications of bioluminescence
D) To explain how the deep-sea environment affects chemical reactions

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