Homologous Structures

Humans, birds, whales, and lizards all have similar arm bones. What is the reason for this?

• The function of these bones is the same in all animals
• They live in similar environments
• They have a common ancestor
• All organisms resemble humans

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NGSS.MS-LS4-2

Which of the following pieces of evolution evidence deals with comparing similar structures in various species?

• fossil record
• comparing embryology
• comparing biochemistry
• comparing anatomy

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NGSS.MS-LS4-2

The structures shown are_________

• homologous
• heterologous
• analogous
• vestigial

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NGSS.MS-LS4-2

An example of a homologous structure 

• human arm and bird wing
• rat appendix  and human appendix
• wing of butterfly and bird wing

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NGSS.MS-LS4-2

  The diagram shows an image of a Pterosaur wing, bat wing, and bird wing.  These are all different organisms, but share similar wing structures.  If these structures are similar due to common ancestry, which of the following best describes them?

• a.  Vestigial Organ
• b.  Embryological Similarities
• c.  Homologous Structures
• d.  Analogous Structures

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NGSS.MS-LS4-2

 The best definition for biological evolution is?

• A.  When Earth’s processes cause change overtime.
• B.  When rock’s change over time.
• C.  When a species changes      overtime.

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NGSS.MS-LS4-4

2. A species is.....

• A type of DNA.
• A group of different colored frogs
• A group of organisms that can mate with each other.

A fossil of an extinct dinosaur is found and the anatomy of the fossil shows similarities to that of a bird. What could this mean?

• This is purely by chance and isn't significant
• The extinct dinosaur and modern bird share a common ancestor
• All dinosaurs evolved into birds and that's why there aren't any dinosaurs alive today
• Dinosaurs choose to fly, and evolved into birds to escape predation and capture food

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NGSS.MS-LS4-2