Phylum Mollusca (General characteristics and classification)
General features: They are commonly called soft bodied animals. They are mostly marine, few fresh water and also found in damp soil. It is the […]
Zoology
Characteristic features of phylum Annelida
Salient features of Annelids They are mostly aquatic and few are terrestrial forms. Most of them are free living and some are ectoparasites. The body […]
General characteristics and classification of phylum Protozoa
Term Protozoa (From Greek, protos meaning first, zoon meaning animals) was given by Goldfass. According to five-kingdom classification system, protozoans belong to the phylum Protozoa […]
Characteristic features of phylum Platyhelminthes
Body is dorso-ventrally flattened, leaf like (unsegmented) or tape like (segmented). They are commonly flat worms. They may be free-living like Planarians or parasitic like […]
General characteristics of phylum Aschelminthes (Nemathelminthes)
They are cylindrical, unsegmented and triploblastic animals commonly known as round worms. They are mostly aquatic, but few are terrestrial. They are free-living as well […]
General characteristics of phylum Coelenterata/Cnidaria
Coelenterates are the first metazoan also called cnidarians (stinging animals). They have one continuous space or gastrovascular cavity called coelenteron. Coelenterates are aquatic (may be […]
General characteristic features of phylum Porifera
Poriferans (Pore bearing animals) are the first multicellular animals. They are commonly called sponges because of their appearance. They are aquatic, mostly marine, rarely fresh […]
How human beings came on earth?
Origin and evolution of man: Man is a mammals and supreme among all other animals which exist today. Central Asia is the place of origin […]
Differences between frog and toad
S.N. Frog Toad 1. Frog lives in or near water resources. Toad lives in dark, shady place in grass or under stones and leaves. 2. […]
Some salient features of class Mammalia
Natural history: Mammals are primarily terrestrial vertebrates but few like whales and dolphins are aquatic. They are the most dominant animals on earth and have […]