Compare and contrast the starfish and sea urchin life cycles.

Life Cycle: Purple Sea Urchins usually live up to 30 years or longer. They breed around January to March every year. The female sea urchins can produce up to twenty million eggs in one year. When the female sea urchins lay their eggs, the young urchins start off as larvae.

the index of refraction of the second medium is higher. i just took the test trust me !