Biology
Characters of Archaeopteryx
Characters of Archaeopteryx Archaeopteryx was a primitive bird consisting of feathers. It is a genus of bird-like- dinosaurs. Archaeopteryx was accepted by paleontologists as the oldest known bird (member of group Avialae). Archaeopteryx is considered a transitional fossil between dinosaurs and modern birds. Its German name is “Urogel”. Scientific position Read more…
Biology
Lipids- Definition, Function, and Categories
Lipids- Definition, Function, and Categories The term lipid was coined by Bloor in 1943. Lipids are Macro biomolecules, and are diverse groups of compounds including fats, oils, hormones, etc. that are insoluble in water due to their hydrophobic nature. The lipids are soluble in organic solvents including fatty acids, waxes, Read more…
Physics
Important discoveries in physics and names of physicists
Important discoveries in physics and names of physicists A list of Scientists and their discoveries are given in the table: Name of Physicist Major discovery/ Contribution Country of Origin Archimedes Principle of buoyancy: The principle states that the upward buoyant force exerted on a body immersed in a fluid, whether Read more…
Biology
Pigeon (Columba livia) – General Characters
Pigeon (Columba Livia) The common name of Columba Livia is a pigeon. The group of birds is mostly medium to large stout-bodied pigeons. The term Columba has been taken from the Latin word Columba means a dove. The bird belongs to class Aves. The systematic position of Columba Livia (Pigeon) Kingdom – Read more…
Biology
Neoteny in Amphibians
Neoteny in Amphibians In some amphibians, the larva becomes sexually mature without metamorphoses or delayed metamorphoses. In some amphibians, the character of neoteny is shown as the failure or delay of the larva to metamorphose while becoming sexually mature. Neoteny emphasizes the retention of embryonic or larval features in the Read more…
Biology
Parental Care in Amphibians
Parental Care in Amphibians Definition of Parental Care: Parental care can be defined as the activities that are directed by an animal towards the protection and maintenance of its own offspring or those of a near relative. Parental Care in Amphibians: In comparison to birds and mammals, little parental care Read more…
Biology
General Characters of Uromastyx
General Characters of Uromastyx Introduction: The Uromastyx is a genus of African and Asian agamid lizards. These are commonly called spiny-tailed lizards, uromastyces, mastigure, or dab lizards. Lizards of genus Uromastyx are primarily herbivorous, but occasionally they eat insects, especially young lizards. They are mostly found in hilly, rocky areas Read more…
Biology
Petromyzon (Lamprey): General Characters
Petromyzon (Lamprey): General Characters Introduction: Lampreys are Anadromous or freshwater, Eel-shaped jawless fishes. They can be readily recognized by the large, rounded sucker which surrounds their mouth and by the single nostril on the top of their head. Systemic position of Petromyzon: Phylum: Chordata Sub Phylum: Vertebrata Group: Agnatha Class: Read more…
Biology
Frog- Rana tigrina- Classification and Characteristic features
Frog- Rana tigrina (Amphibian) A frog is an amphibian, living both on land and water. Amphibians are the first group of chordates that lived outside water. These are coldblooded vertebrates tetrapods. Classification of Rana tigrina (Frog): Phylum – Chordata Subphylum – Gnathostomata Superclass- Tetrapoda Class- Amphibia Order- Anura Genus- Rana Read more…
