Figure 4. Fertilized P. purpuratu egg stained with DAPI. PB, polar body, arroe, blastomeres nucleus (X400)
Figure 5. S algosus larval stage stained with DAPI. PBI, Polar body: arrow, blastomere nucleus (X400)
Figure 6. Isolated unfertilized egg surfece of P. purpuratus. Arrows, cortical granule-like structure; N. nucleus (X400)
Figure 4-6: Schematic drawings to facilitate the comprehension of the legends of the ilustration