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Card 16

Front

What membrane surrounds the mouth?

Back

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Card 17

Front

What is the perignathic girdle?

Back

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Card 18

Front

What is the Aristotle's lantern?

Back

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Card 19

Front

What are the three main functions of the tube feet?

Back

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Card 20

Front

What two things do the tubercles consist of?

Back

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Card 21

Front

How does the muscle attach to the spine?

Back

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Card 22

Front

What is the regular echinoid mode of life?

Back

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Card 23

Front

What is a defining characteristic of an irregular echinoid?

Back

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Card 24

Front

What shape are irregular echinoids?

Back

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Card 25

Front

What does the mouth lack?

Back

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