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Science: Chapter 4-3
What evidence supports evolution?
6
Science
6th Grade
03/29/2008
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Term
What is the most complete fossil record of evolutionary change?
 Definition

the horse

 

It is traced back to 60 million years ago.
Term

What are homologous (ho/mol/o/gus)structures?

 Definition

body parts that have the

SAME basic structure
Term
What are vestigial (ves/ti/gial) structures?
 Definition

body parts that seem to have

NO FUNCTION or purpose
Term
What does the fossil record show?
 Definition
changes have taken place throughout Earth's history
Term
What are some examples of homologous structures?
 Definition
  1. lion's foreleg
  2. bat's wing
  3. dolphin's flipper

All have similar bone structure.
Term

What is an example of a

vestigial structure?

 Definition
your appendix
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