NEET BIOLOGY

Detailed explanation-1: -When living organisms emit light, this property is called bioluminescence. This is usually seen in animals belonging to phylum Ctenophora.

Detailed explanation-2: -Bioluminescence (the property of a living organism to emit light) is well-marked in ctenophores. Sexes are not separate. Reproduction takes place only by sexual means fertilizations is external with indirect development.

Detailed explanation-3: -Known as comb jellies, they use eight longitudinal rows of cilia for locomotion. When the cilia beat, light is scattered, producing a rainbow of colors. The beating combs act like a prism, breaking the light into its color components.

Detailed explanation-4: -Ctenophora is a phylum of exclusively marine invertebrates. Ctenophora means “comb-bearing”. They are commonly known as comb jellies or sea walnuts. The distinguishing feature of the phylum is the presence of comb plates with cilia that are used for locomotion.

Detailed explanation-5: -Cnidarians in both pelagic as well as benthic zones, including corals, anemones, hydroids and medusae are known to exhibit bioluminescence. All of them use the luciferin coelenterazine as the substrate for their biochemical pathways (hence the name “coelenterazine”).