form and function
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Biology I: Form and Function
Mr. Nettles
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Today’s Agenda: Thurs. Dec. 1, 2011
Warm-Up: Finish up Summarizations (Due Today)
Lesson: Form and Function Lecture
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Today’s Objectives:
I will define: evolution, form, function, comparative anatomy, homologous structure, analogous structure, and vestigial structure.
I will recognize the relationship between form and function in living things.
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What is Evolution?
Evolution is the process by which species change over time.
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Form vs. Function
Form is the visual appearance and configuration of an organism.
Function is any type of life process carried out by an organism.
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Comparative Anatomy
Comparative Anatomy is a method by which scientist study the physical features and body parts of different animals to discover how they are related or similar.
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Homologous Structures
Homologous Structures are structures that have similar form but different functions.
These structures look alike in some ways, but they do different things.
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Homologous Structures
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Analogous Structures
Analogous Structures are structures that have similar function but different forms.
These structures do the same thing, but they look different.
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Analogous Structures
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Vestigial Structures
Vestigial Structures are structures that don’t play a role in the way an organism functions.
They are body parts that don’t really do much work in the body.
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Vestigial Structures