Animal Body Plans

Animal Body Plans

Body Cavities

Coeloms

What are they?

Benefits?

What's a hydrostatic skeleton?

What is it?

Coleomate

What is it?

Pseudocoelomate

What is it?

Acoelomate

What is it?

What kinds of animals have segmentation?

Purpose?

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​Segmentation

Hox Genes

What are they?

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Hox Genes

What are they?

How do they relate to body segmentation?

How do Hox genes help determine evolutionary relationships between animals?

How can we compare Hox genes?

What's going on in this picture?

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Hox Gene Expression

Let's Practice :)

Multiple Choice

Animal with no coelom

• Coelom

• Coelomate

• Acoelomate

• Psuedocoelomate

Multiple Choice

Animal with a true coelom

• Coelom

• Coelomate

• Acoelomate

• Psuedocoelomate

Multiple Choice

Animals with coeloms that are not fully lined

• Coelom

• Coelomate

• Acoelomate

• Psuedocoelomate

Open Ended

What are the benefits of having a coelom? List at least 2.

Fill in the Blanks

The division of the body into specialized regions

Multiple Choice

All of the following are examples of animals who show clear segmentation except

• Annelids (earthworms)

• Cephalopods (octopus)

• Chordata (fish)

• Arthropoda (lobster)

Open Ended

How do Hox genes influence segmentation?

Open Ended

Explain how Hox genes can help us determine evolutionary relationships between animals?

Multiple Choice

DNA sequencing is a great way to compare Hox genes

• True

• False