Sea stars, also known as starfish, have the following characteristics: Radially symmetrical adult, bilaterally symmetrical larvae, no cephalization, true coelom.

Here's why:

1. Radially symmetrical adult: Sea stars have a radial symmetry as adults, meaning they can be divided into equal halves in any plane along a central axis. This is because their body parts are arranged around a central point.

2. Bilaterally symmetrical larvae: The larvae of sea stars, however, are bilaterally symmetrical, meaning they can only be divided into identical halves along one specific plane. This is a common characteristic in many animal species.

3. No cephalization: Cephalization refers to the concentration of nervous tissues and sensory organs in the head of an animal. Sea stars do not have a well-defined head or brain, so they do not exhibit cephalization.

4. True coelom: A coelom is a fluid-filled body cavity that is completely lined by mesoderm tissue. Sea stars have a true coelom, which provides space for the development and suspension of internal organs, and also allows for more efficient and flexible movement.

Question

Sea stars, also known as starfish, have the following characteristics: Radially symmetrical adult, bilaterally symmetrical larvae, no cephalization, true coelom.

Here's why:

1. Radially symmetrical adult: Sea stars have a radial symmetry as adults, meaning they can be divided into equal halves in any plane along a central axis. This is because their body parts are arranged around a central point.

2. Bilaterally symmetrical larvae: The larvae of sea stars, however, are bilaterally symmetrical, meaning they can only be divided into identical halves along one specific plane. This is a common characteristic in many animal species.

3. No cephalization: Cephalization refers to the concentration of nervous tissues and sensory organs in the head of an animal. Sea stars do not have a well-defined head or brain, so they do not exhibit cephalization.

4. True coelom: A coelom is a fluid-filled body cavity that is completely lined by mesoderm tissue. Sea stars have a true coelom, which provides space for the development and suspension of internal organs, and also allows for more efficient and flexible movement.

Knowee AI · Accepted Answer

Sea stars, also known as starfish, have the following characteristics: Radially symmetrical adult, bilaterally symmetrical larvae, no cephalization, true coelom.

Here's why:

1. Radially symmetrical adult: Sea stars have a radial symmetry as adults, meaning they can be divided into equal halves in any plane along a central axis. This is because their body parts are arranged around a central point.

2. Bilaterally symmetrical larvae: The larvae of sea stars, however, are bilaterally symmetrical, meaning they can only be divided into identical halves along one specific plane. This is a common characteristic in many animal species.

3. No cephalization: Cephalization refers to the concentration of nervous tissues and sensory organs in the head of an animal. Sea stars do not have a well-defined head or brain, so they do not exhibit cephalization.

4. True coelom: A coelom is a fluid-filled body cavity that is completely lined by mesoderm tissue. Sea stars have a true coelom, which provides space for the development and suspension of internal organs, and also allows for more efficient and flexible movement.

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