Which one of the following is not a living fo | vedclass

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(D) : $A$ living fossil is a term for any living species (or clade) of organism that closely resembles species otherwise known only from fossils and h

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Archaeopteryx

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(D) : $A$ living fossil is a term for any living species (or clade) of organism that closely resembles species otherwise known only from fossils and has no close living relatives. These species have survived major extinction events and generally retain low taxonomic diversity.Some examples of living fossils in animals include the coelacanth,coral (polyp),Crocodylia (crocodiles,gavials,and alligators),horseshoe crab $(Limulus \ polyphemus)$,monotremes (platypus and echidna),and the purple frog $(Nasikabatrachus \ sahyadrensis)$.$Archaeopteryx$ is the earliest and most primitive known bird to date. It lived in the Jurassic Period around $150-155$ million years ago. It possessed feathers and wings but also had teeth and a skeleton similar to a small carnivorous dinosaur; therefore,it exhibited both bird and theropod dinosaur features. $Archaeopteryx$ is a powerful piece of evidence showing that birds evolved from dinosaurs and is considered an extinct transitional fossil,not a living fossil.

Column-$I$	Column-$II$
$(1)$ Mutation	$(a)$ Change in population allele frequencies due to chance alone.
$(2)$ Gene flow	$(b)$ Difference in survival and reproduction.
$(3)$ Natural selection	$(c)$ Immigration,emigration change allele frequencies.
$(4)$ Genetic drift	$(d)$ Source of new alleles.

Which one of the following is not a living fossil?

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