in which phylum will you place the organisms which have calcareous spines on their body, presences of holes or pores all over the body
1) Echinodermata
2) Poriferra
Sponges have a cell aggregate body plan with pores all over their body. To which phylum do they belong?
In phylum ______, the animals have a soft, unsegmented body, with a hard, calcareous shell to protect the soft body.