|
|
 |
|
|
 |
|
Why does a sea urchin have spines?
|
The sea urchin's spines help it to ward off predators. The spines are sharp and often contain a poison. The sea urchin can also point them toward the source of danger. The ability to move the spines allows some sea urchins to employ them as a battery of rigid legs. They can tiptoe along the sea bed on their spines. | | Some sea urchins have an intimidating array of spines. |
|
| |
Previous:
Back
|
Book:
1001
|
Section:
Nature
|
Chapter:
Simple Animals
|
|
|
|
 |
|
|
