Formative Evidence of Evolution

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

• vestigial structures
• homologous structures
• adaptive radiation
• fossil

Does every deceased organism become a fossil?

• Yes, fossilization is very common and has left us with a complete fossil record.

• No, fossilization is not common and can leave gaps in the fossil record.

• No, fossilization is not common, but it occurs enough to give us a complete fossil record.

Some organisms that share a common ancestor have features that have different functions, but similar structures.  These are known as

• vestigial structures
• analogous structures
• homologous structures
• fossil structures

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

• natural selection
• embryology
• speciation
• evolution

Which of the following is an example of a vestigial structure?

• the wings of a red-tailed hawk
• the hind limbs of a house cat
• the fins of sharks
• the tailbone of a human

What type of structures are these?

• homologous
• vestigial 
• analogous
• fossil

Structures that have the same function but different structures are...

• homologous structures
• analogous structures
• vestigial structures
• embryology 

Two organisms that are closely related would have

• very similar DNA sequence
• exactly the same DNA sequences
• no proteins in common
• completely different DNA sequence

Which best describes these fossils?

• The oldest fossils can be found on the lower layers
• The oldest fossils can be found at the top layers
• The youngest fossils are always found on the bottom layers
• You can not tell the age of any of these fossils

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Individuals that are well adapted to their environment will survive and produce:

• Fewer mutations
• Stronger genes
• More offspring
• Better traits

Tags

NGSS.MS-LS4-4