Evidence of Evolution Embryology

What is this an example of?

• vestigial structures

• embryology

• homologous structures

• fossil record

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The cave fish and minnow are related to each other but the cave fish is blind and only has the remnants of an eye. What type of structure is this?

• vestigial

• analogous

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Study of embryos of various organisms to show a common ancestor because of similarities in development

• natural selection

• speciation

• embryology

• evolution

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Pictured above is Astyanax mexicanus, a type of freshwater fish found in caves and other underground habitats across Mexico and the southern part of the United States. Both the surface and cavefish belong to the same species, but unlike the surface fish, the cavefish has no eyes. How can the survival of the cavefish population be explained?

• Cavefish population has survived in caves without eyes because it is an adaptation to the

  environment.

• A cavefish produced offspring after having lost its eyes in an injury and changed the

  population overtime.

• The surface was too bright and predators were catching them, so they adapted to be

  transparent in color.

• Cavefish were too far away from sunlight, causing problems in their development and

  changing their appearance.

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If modern organisms have a lot of homologous structures, what inference might paleontologists make about those organisms?

• They are reptiles

• The organisms have a common ancestor

• One organism evolved from the other.

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Structures with the same parts have different functions; suggests that organisms share a common ancestry

• vestigial structures

• homologous structures

• adaptive radiation

• fossil

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Similar structures with different purposes found in different species are known as _____

• vestigial structures

• DNA

• homologous structures

• the fossil record

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Which of the following best describes the study of embryology in the context of evolution?

• The study of adult organisms

• The study of genetic mutations

• The study of embryos to understand evolutionary relationships

• The study of fossils

What does the similarity in embryonic development among different species suggest?

• They have different ancestors

• They have a common ancestor

• They evolved independently

• They are unrelated

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Which of the following is an example of evidence for evolution from embryology?

• Similar bone structures in adult organisms

• Similar embryonic stages in vertebrates

• Different coloration in species

• Unique feeding habits