Morphology and life cycle of mosquitoes
Mosquitoes are harmful insects found in hot and moist places generally common during monsoon and spring seasons. They are generally active during the hours of […]
Zoology
Differences between Anopheles and Culex
S.N. Anopheles Culex A. Egg Egg 1. They are laid horizontally and singly on the water surface. They are laid vertically in cluster (or raft […]
Differences between centipedes and millipedes
S.N. Centipedes Millipedes 1. The body is dorso-ventrally flat. The body is cylindrical. 2. The body is divided into two segments; head and trunk. The […]
The protochordates (General characteristic features)
Protochordates are commonly called lower chordates. They lack a head and a cranium, so they are also known as Acraniata. Protochordates consists of three sub-phyla […]
General characteristic features of phylum Chordata
Chordates are bilaterally symmetrical, deuterostomial, eucoelomate eumetozoans. A flexible but firm supporting skeletal rod, called notochord is present in the embryo or throughout life. From […]
General characteristic features of superclass Pisces (Fish)
They are the first jawed vertebrates and the study of fish is called Ichthyology. They are aquatic (may be fresh water or marine). Fish are […]
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 […]
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 […]