PRINCETON, NJ -- Despite the recent drop in the U.S. fertility rate, Americans' attitudes about having children have remained unchanged over the past 23 years. More than nine in 10 adults say they already have children, are planning to have children, or wish that they had had children.
Phylum. Starfish belong to the phylum Echinodermata, which is the largest phylum without any members that live on land or in fresh water. Echinoderms have five-point radial symmetry as adults, but are bilaterally symmetrical as larvae. They have an endoskeleton consisting of calcareous plates that often include spines.upiterimages/Photos.com/Getty Images. Although fish and starfish both belong to the kingdom Animalia -- which is the largest division of taxonomic classification -- starfish lack a spine, and therefore belong to a different phylum than true fish.
Characteristics of life of phylum chordata, class Chondrichthyesâ¦ genus squalus species acanthias. Cells: Multicellular Organization: Bilateral symmetry Require energy: predators, mainly boney fishâ¦ also canibalistic-PowerPoint PPT Presentation.xternal Anatomy of the Dogfish Shark. 1  Along the sides of the body is a light-colored horizontal stripe called the lateral line. 2  The line is made up of a series of tiny pores that lead to receptors that are sensitive to the mechanical movement of water and sudden changes of pressure.