Analogous Homologous

Which is an example of an analogous structure?

• Dog and Bird

• Lizard and Dolphin

• Bat and Butterfly

• Human’s arm and whale flipper

Tags

NGSS.MS-LS4-2

What is an example of a homologous structure?

• Penguin and shark

• Bird and butterfly

• Bat and Butterfly

• Human’s arm and whale flipper

Tags

NGSS.MS-LS4-2

How do analogous structures differ from homologous structures?

• Analogous structures perform similar functions but do not share a common evolutionary origin.

• Homologous structures have different functions but share a common evolutionary origin.

• Analogous structures are found only in plants, while homologous structures are found only in animals.

• There is no difference; both terms describe the same phenomena.

How can you identify analogous structures in different animals?

• By comparing their embryonic development

• By examining the DNA sequences

• By observing the structures that perform a similar function but are not similar in origin

• By studying the fossil record

How do homologous structures provide evidence for common ancestry, while analogous structures do not?

• Homologous structures indicate common ancestry through similar structures in different species, whereas analogous structures perform similar functions but do not derive from a common ancestor.

• Analogous structures are a result of common ancestry, while homologous structures are not.

• Both homologous and analogous structures provide equal evidence for common ancestry.

• Neither homologous nor analogous structures provide evidence for common ancestry.

Tags

NGSS.MS-LS4-2

Read the provided scenario about two different species of birds. Determine whether the similarities between their wing structures are homologous or analogous and explain your reasoning. What factors would help you determine if the similarities in wing structures between two bird species are homologous or analogous?

• Homologous, due to shared ancestry

• Analogous, due to similar environmental pressures

• Cannot be determined without genetic information

• Both homologous and analogous depending on other factors

Tags

NGSS.MS-LS4-2

How do homologous, analogous, and vestigial structures support the concept of common ancestry and the theory of evolution?

• By showing how species can adapt to different environments

• By indicating how species have evolved from common ancestors

• By demonstrating the role of genetic mutations in evolution

• By proving that evolution does not occur

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

Imagine you are a scientist studying different animal species. How would you use the knowledge of homologous, analogous, and vestigial structures to determine the evolutionary relationships between these species?

• By comparing the DNA sequences of the species

• By observing the behavior of the species in their natural habitat

• By analyzing the physical structures and their functions to infer common ancestry

• By measuring the geographical distances between the habitats of the species

Tags

NGSS.MS-LS4-2

What are homologous structures?

• Structures that are similar in different species because they were inherited from a common ancestor.

• Structures in different species that look alike but have different evolutionary origins.

• Structures that perform the same function in different species but are not similar in origin or structure.

• Random mutations that result in similar structures in different species.

Tags

NGSS.MS-LS4-2

How can you identify homologous structures in different animals?

• By comparing anatomical structures that have a similar position

• By observing their behavior in natural habitats

• Through genetic testing only

• By the habitats they live in

Tags

NGSS.MS-LS4-2