3. in the phylum porifera, the highest level of organization is arguably only at the cellular' levél. how
have the cnidarians become more complex in terms of organization? what does this mean?

Cnidarians have become more complex in terms of organisation than the poriferan as they have developed a tissue level organisation,they show locomotion , exhibit polymorphism  and a radial symmetry.

This means that cnidarians evolved later than poriferans and are adapted to more competitive and complex environment.

Explanation:

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.