1. Urban areas have a bigger population density compared to suburban areas. 2. Urban areas usually include the inner, or main city, whereas suburban areas are those that are just adjacent to the city, or surround the city. 3. Urban areas are more congested in terms of people and establishments compared to suburban territories.
Noun. 1. Parazoa-multicellular organisms having less-specialized cells than in the Metazoa; comprises the single phylum Porifera. subkingdom Parazoa. animal kingdom, Animalia, kingdom Animalia-taxonomic kingdom comprising all living or extinct animals.phylum Porifera, Porifera-coextensive with the subkingdom Parazoa: sponges.oun. 1. Parazoa-multicellular organisms having less-specialized cells than in the Metazoa; comprises the single phylum Porifera. subkingdom Parazoa. animal kingdom, Animalia, kingdom Animalia-taxonomic kingdom comprising all living or extinct animals.
Protozoa are single-celled eukaryotes (organisms whose cells have nuclei) that commonly show characteristics usually associated with animals, most notably mobility and heterotrophy. They are often grouped in the kingdom Protista together with the plant-like algae and fungus-like water molds and slime molds. In some newer schemes, however, most algae are classified in the kingdoms Plantae and Chromista, and in such cases the remaining forms may be classified as a kingdom Protozoa. The name is misleading, since they are not animals (with the possible exception of the Myxozoa).