Comparing Embryos: Evidence for Common Ancestors

The significance of studying embryos in understanding animal development and evolution is:

• To understand the genetic basis of development

• To observe the physical changes in adult animals

• To study the behavior of adult animals

• To analyze the diet of animals

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The early stages of development in embryos provide evidence for common ancestry among different species because:

• They show similar patterns of development across species.

• They have completely different structures in all species.

• They develop into different organisms with no similarities.

• They do not provide any evidence for common ancestry.

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Identify the four types of embryos shown in the diagram.

• Fish, Bird, Reptile, Mammal

• Amphibian, Fish, Bird, Mammal

• Reptile, Amphibian, Fish, Bird

• Mammal, Reptile, Amphibian, Fish

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NGSS.MS-LS4-3

The similarity of different types of embryos is evidence that many species that are very different today share common ancestors from the past.

• True

• False

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NGSS.MS-LS4-3

Unborn animals in early stages of development are called

• embryos

• hatchlings

• infants

• toddlers

The similarities between animal embryos have also helped paleontologist's understand how animal species have changed over time through the process of involved in ___________.

• natural selection

• evolution

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NGSS.MS-LS4-3