Haeckal's theory of recapitulation (Biogenetic law) means that

All organisms start as an egg.

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Life history of an animal reflects its evolutionary history.

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Progeny of an organism resembles its parents.

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Body parts once lost are regenerated.

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Solution

The correct option is A Life history of an animal reflects its evolutionary history.
Biogenetic law states the relationship between developement and evolution. It is also called recapitulation theory, postulated by Ernst Haeckel in 1866. It states that ontogeny recapitulates phylogeny i.e., the development of the animal embryo and young traces the evolutionary development of the species.
So, the correct answer is option B.

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