What are the unique features of the animals of phylum – Echinodermata? The animals belonging to the phylum – Echinodermata are pentaradially symmetrical which means their body can be divided into 5 or multiple parts. The exoskeleton of the body is full of spikes, spines, and pedicellariae. The body is divided into oral and aboral … Read more
Why grasshopper is placed in the class – Insecta? Grasshopper is placed in the class Insecta because it has an exoskeleton made of chitin, a three-segmented (head, thorax, and abdomen) body, three pairs of jointed legs, compound eyes, and a pair of antenna. These are the main characteristics of the animals of the class – … Read more
Why are the cnidarian animals known as bilayered animals? The embryos of the animals in which there are only layers – ectoderm and endoderm are called bi-layered animals. In between these two layers, there is an acellular jelly-like structure called mesoglea. All the animals of the Cnidaria phylum are bi-layered. For this reason, the cnidarian … Read more
What do you mean by binomial nomenclature? According to the international rule, the combined name which is given to an animal by placing the name of the ‘genus’ first and then the name of the ‘species’ is called binomial nomenclature. In this case, both the words are either in Latin or in modified Latin. For … Read more
What do you mean by ICZN? ICZN (International Commission of Zoological Nomenclature) is an international organization for the nomenclature of animals. This organization makes rules about the nomenclature of animals. Nomenclature is an important process to identify a special animal or animal group.
What do you mean by radially symmetrical animals? The animals which can be divided into more than two similar parts from a central axis are called radially symmetrical animals. Hydra, Jellyfish, Metridium, and their related animals are examples of radial symmetry where the mouth is present at one end of their longitudinal axis.
Liberty Generally, liberty is understood as whatever one does at his own will. In an actual sense, liberty does not mean this sort of unlimited freedom. Because absolute freedom creates anarchy in society. For example, if somebody is allowed to do anything of his own will it might harm others resulting in a conflicting environment. … Read more
Law Law is a Persian word that has specific rules and regulations. The English meaning of this word is ‘Law’. Law is used equally everywhere. The scholars have defined law in many ways. Aristotle says, “the expression of logic and reason in a society is the law.” According to Professor Holland, ‘Law is that general … Read more