Differences between Exocrine and Endocrine glands
S.N. Exocrine glands Endocrine glands 1. These glands have ducts. These glands lack ducts. 2. Chemical substance secreted by exocrine glands is called enzyme. They […]
Biology
Characteristic features of class Reptilia
General features: They are commonly known as the creeping vertebrates. Reptiles were the first vertebrates fully adapted for life on land. Some live in water […]
Phylum Arthropoda (General characteristics and classification)
Salient features: Phylum Arthropoda is the largest group of the animal kingdom, surpasses all others both in number and ecological diversity of organisms. They are […]
Characteristic features of phylum Echinodermata
Habitat: They are commonly called spiny skinned animals. All are marine, generally live in sea bottom and are slowly moving animals. Some animals are pelagic […]
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 […]
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 […]