Question

3.Few fossils of the earliest animals exist because they?
A. Had hard shells that broke down easily, leaving no trace.
B. Were large and likely to be eaten by other after they died.
C. Were soft-bodied and tiny, therefor unlikely to fossilize.
D. Lived only in volcanic regions and were destroy by lava flows.
4.The simplest animals to have body symmetry are?
A. Sponges
B. Algae
C. Cnidarians
D. Echinoderms