Posted inBiomolecules

Lipids

These are group of substances with greasy consistency. They are with long hydrocarbon chain containing carbon, hydrogen and oxygen. In lipids, hydrogen to oxygen ratio is greater than 2:1. Lipid…
Posted inEcology

ORGANISMS AND POPULATIONS

POPULATION: Population attributes: Population: a group of individual living in a well defined geographical area, share or compete for similar resources, potentially interbreed. Birth rate and death rate refers to per…
Posted inBiodiversity

Differences between Pteridophytes and Gymnosperm

S.No.CharacterPteridophytesGymnosperms1HabitatHygrophytes (i.e. grow in moist and shaddy places).Xerophytes (Grow where the water supply is scanty.)2RootAdventitious rootsTap Root3Vascular cambiumAbsentPresent4ArchegoniumNeck canal cell , venter canal cell PresentAbsent5WaterEssential for FertilizationNot necessary6Microspores and MegasporesDevelops…
Posted inCell Biology

Eukaryotic Nucleus

Structure Two nuclear membranes, inner and outer nuclear membranes. Nuclear pore complexes, which allow the regulated exchange of molecules between the nucleus and the cytoplasm. Space between the inner and…
Posted inMicrobiology

Introduction to Microbiology

Microorganisms are present everywhere on earth which includes humans, animals, plants and other living creatures, soil, water and atmosphere MICROBIOLOGY : the study of small living things. MICRO = small, BIO…
Posted inZoology

Cancer

Abnormal, uncontrolled and purposeless division of cells may lead to the formation/ development of mass of undifferentiated cells i.e. tumor. When tumor is malignant, it is described as cancer and…
Posted inZoology

Nucleic Acids-DNA & RNA

Swiss biochemist, Friedrich Miescher (1869) discovered and isolated nucleic acids from the pus cells. By 1938, it became evident that nucleic acids are of two types:- Deoxyribose nucleic acid (DNA)…