Order Primates
It is an order coming under the subclass Eutheria. This order is of interest because it includes man, besides lemurs, tarsiers, monkeys and apes. They…
Biology
Describe on Class Mammalia
The term “mammalia” was given by Linnaeus (1758) to that group of animals which are nourished by milk from the breasts of the mother. They…
Describe on Class Aves
Birds are one of the most intersting and widely known group of animals. There are more than 8600 species of birds distributed all over the…
Describe on Reptilia
Reptilas are represented by lizards, snakes, turtles, tortoises, alliga-tors, crocodiles and the tuatara lizard, Sphenodon punctatuni. The tetrapods like reptiles, birds and mammals are referred…
Describe on Class Amphibia
The living representatives of class Amphibia include frogs, toads, newts, salamanders and limbless caecilians. Fig: Amphibians The transition from aquatic to terrestrial living is clearly indicated…
Describe on Subphylum Vertebrata or Craniata
Subphylum Vertebrata is characterized by the presence of brain case or cranium and a vertebral column which forms the chief skeletal axis of the body. The…
Describe Protochordata or Acrania
The protochordata are considered as the fore runners of vertebrata The classification of the protochordata is based on the nature of the noto-chord. Sub phylum…
Classification of Phylum Chordata
This phylum derives its name from one of the common characteristics of this group namely the notochord (Gr. noton, back + L. chorda, cord). The…
Diversity of Chordates
The chordates exhibit an astonishing diversity in form, physiology and habits. The number of chordate species is limited. About 49,000 species are on record which…
Phylum Nematoda and their Characteristies
Phylum Nematoda are the popular round worms. The body is narrow and pointed at both the ends. There are no body segments. The body is covered…
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