Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN: 9780134746241
Author: Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher: PEARSON
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This table compares Regular and Irregular Echinoids in terms of their Body shape, Symmetry, Periproct Location, and Spines, with an emphasis on their Advantage to burrowing.

- **Body Shape**
  - Regular Echinoids: [Information Needed]
  - Irregular Echinoids: [Information Needed]
  - Advantage to Burrowing: [Information Needed]

- **Symmetry**
  - Regular Echinoids: 5-fold symmetry
  - Irregular Echinoids: [Information Needed]
  - Advantage to Burrowing: [Information Needed]

- **Periproct Location**
  - Regular Echinoids: [Information Needed]
  - Irregular Echinoids: [Information Needed]
  - Advantage to Burrowing: [Information Needed]

- **Spines**
  - Regular Echinoids: [Information Needed]
  - Irregular Echinoids: [Information Needed]
  - Advantage to Burrowing: [Information Needed]

This comparison highlights structural and functional differences between Regular and Irregular Echinoids, focusing on features relevant to their burrowing capabilities.
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Transcribed Image Text:This table compares Regular and Irregular Echinoids in terms of their Body shape, Symmetry, Periproct Location, and Spines, with an emphasis on their Advantage to burrowing. - **Body Shape** - Regular Echinoids: [Information Needed] - Irregular Echinoids: [Information Needed] - Advantage to Burrowing: [Information Needed] - **Symmetry** - Regular Echinoids: 5-fold symmetry - Irregular Echinoids: [Information Needed] - Advantage to Burrowing: [Information Needed] - **Periproct Location** - Regular Echinoids: [Information Needed] - Irregular Echinoids: [Information Needed] - Advantage to Burrowing: [Information Needed] - **Spines** - Regular Echinoids: [Information Needed] - Irregular Echinoids: [Information Needed] - Advantage to Burrowing: [Information Needed] This comparison highlights structural and functional differences between Regular and Irregular Echinoids, focusing on features relevant to their burrowing capabilities.
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  Regular Echinoids Irregular Echinoids Advantage to burrowing ?
Body shape Globular shaped skeleton  Heart- shaped The flattened body shape of the regular and irregular echinoids help them to burrow through the sediment.
Symmetry 5 fold Bilateral symmetry The five-fold symmetry of the regular echinoids help in burrowing.
Periproct location Centrally located Located towards the posterior end The location of periproct in both regular and irregular echinoids do not affect burrowing.
Spines Spines are used for locomotion as well as defence  and are made up of calcite. Spines like hairs The presence of spines in both regular and irregular spines prove advantageous for burrowing as well as for locomotion.
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