Characteristic features of class Aves (the birds)
General features: Birds are cosmopolitan and found in all continents, seas and most islands. Their wide occurrence is due to their power of flight, which […]
Month: December 2017
Differences between Metals and Non-metals
S.N. Metals Non-metals 1. Metals are usually solids at room temperature. {Exception: Mercury (Hg) and Gallium (Ga) are liquid metals}. Non-metals usually are solids or […]
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 […]
Differences between Heat and Temperature
S.N. Heat Temperature 1. The total kinetic energy produced by the vibration of all the molecules in a substance is called its heat content. The […]
Differences between Convex lens and Concave lens
S.N. Convex lens Concave lens 1. A lens which is thick (bulged) in the middle but thin (tapered) at the edges is called convex lens. […]
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 […]