Florida Biology EOC Practice Test

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Which of the following terms refers to similar structures found in varying animals that evolved from a common ancestor?

Codominance
Genotype
Homologous structures
Polygenic inheritance

The correct answer is: Homologous structures

Homologous structures refer to similar structures found in varying animals that evolved from a common ancestor. Option A, codominance, is incorrect because it refers to a genetic condition where both alleles of a gene are equally expressed. Option B, genotype, is incorrect because it refers to the genetic makeup of an organism. Option D, polygenic inheritance, is incorrect because it refers to the inheritance of a trait that is controlled by multiple genes. In contrast, homologous structures are structures that have a similar origin and structure, but have adapted to different functions in different species through the process of evolution. This supports the theory of evolution and common ancestry among different species.