Check Your Understanding
Click on the question marks to see the correct answers.
1. What does each stage look like?
Fertilized
16 Cell
Blastula
Gastrula
Prism
2. What's happening in each image?
3. How big is a sea urchin egg?

4. How big is a sea urchin sperm?

5. What do sea urchins eat?
Seaweed
Each Other
People!
Dead Fish
Live Fish

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