Question

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Why do fireflies glow at night ?

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Answer 1

Explanation:

Fireflies glow at night because of a chemical reaction taking place which involves emission of light. Actually fireflies store a protein (luciferin), which combines with oxygen (O2 ) in the air (in the presence of an enzyme) to form a new substance (oxyluciferin) along with the evolution of energy in the form of light.

Answer 2

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Fireflies produce a chemical reaction inside their bodies that allows them to light up. This type of light production is called bioluminescence. ... When oxygen combines with calcium, adenosine triphosphate (ATP) and the chemical luciferin in the presence of luciferase, a bioluminescent enzyme, light is produced.