Question

name the Phylum showing the following characteristics 1=join leg 2 =spiny skin 3=segmented body 4= body is dorsiventrally flattened

Answer 1

platyhelminthes... the flat worms

Answer 2

PlatyhelminthesThe body of animals in this group is far more complexly designed than in the two other groups we have considered so far. The body is bilaterally symmetrical, meaning that the left and the right halves of the body have the same design. There are three layers of cells from which differentiated tissues can be made, which is why such animals are called triploblastic. This allows outside and inside body linings as well as some organs to be made. There is thus some degree of tissue formation. However, there is no true internal body cavity or coelom, in which welldeveloped organs can be accommodated. The body is flattened dorsiventrally, meaning from top to bottom, which is why these animals are called flatworms. They are either freeliving or parasitic. Some examples are freeliving animals like planarians, or parasitic animals like liverflukes.