CHECK YOUR UNDERSTANDING

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