Slide 1 EARLY PALEOZOIC LIFE Cambrian Explosion Evolution’s “big bang” lasted about 10 million years All principal animal phyla except Bryozoa appeared between 535…
Slide 1 SPONGES Slide 2 Some basic sponge structure Asconoid LeuconoidSyconoid Increasing surface area for same volume Slide 3 Structure of the sponge wall Slide 4 Unique…