Question:
Haeckel's biogenetic law is
Haeckel's biogenetic law is
Updated On: Jul 28, 2022
- ontogeny repeats phylogeny
- phylogeny repeats ontogeny
- reproductive isolation
- every organism is produced by its parents.
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The Correct Option is A
Solution and Explanation
Haeckel's biogenetic law is ontogeny recapitulates phylogeny. Ontogeny is the life history of the individual starting from ovum and phylogeny is the sequence of adult ancestors which must have incurred in the evolution of the group of this individual. It means an individual during its development repeats the most important changes which its ancestors have undergone during the long and slow course of their evolution.
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Concepts Used:
Evolution
Evolution is a process that occurs in changes in the genetic content of a population over time. Evolutionary change is generally classified into two: microevolution and macroevolution. The process of changes in allele frequencies in a population over time is a microevolutionary process. Three main mechanisms that cause allele frequency change are natural selection, genetic drift, and gene flow. On the other hand, macroevolution refers to change at or above the level of the species.