You are here. Home Â» Alcohol & Your Health Â» Special Populations & Co-occurring Disorders Â» Underage Drinking. Underage drinking is when anyone under the minimum legal drinking age of 21 drinks alcohol. Underage drinking is a risk that attracts many developing adolescents and teens. When young people try alcohol, they often donât realize the damaging effects drinking can have on their own lives, their families, and their communities.
Light production in fireflies is due to a type of chemical reaction called bioluminescence. This process occurs in specialized light-emitting organs, usually on a firefly's lower abdomen. The enzyme luciferase acts on the luciferin, in the presence of magnesium ions, ATP, and oxygen to produce light.
Quick Answer. The eyes of many species of vertebrates appear to glow at night because of the reflection of light in the eye across a thin membrane called the tapetum lucidum. Located directly behind the retina, this membrane enhances animals' vision in night or low-light conditions by reflecting light back through the retina.