They all develop gills, slits and tails
Answer:
well it would have to be out of your 23 pairs, but which ever it is will have an entire section of the chromosome missing, hence the name deletion.
Explanation:
Multicellular organisms are referred to as eukaryotes while the opposite, unicellular organisms, are called prokaryotes. Among all the kingdoms, I believe the kingdom which all organisms are multicellular are Animalia and Plantae.