Photosynthesis Photosynthesis is a chemical process that converts carbon dioxide into organic compounds, especially sugars, using the energy from sunlight. Photosynthesis occurs in plants, algae and many species of bacteria,…

The biotic or the living components of the ecosystem are divided into two categories Autotroph and Heterotroph. Let us read about them in detail. Autotrophs Autotrophs are those organisms that are capable…

Introduction of Nutrition and Digestive System Nutrition (also called Nourishment or aliment) is the provision, to cells and organisms, of the materials necessary (in the form of food) to support…

Active Immunization (Vaccination) People had observed in the past that individuals who recovered from certain diseases are protected for life time from recurrences. This gave rise to the concept of…

Types of Immunity There are two main types of immunity (i) Natural or innate (i.e. genetic, form birth), and (ii) Acquired (i.e. developed during lifetime) A. Natural or Innate Immunity…

Antigen & Antibody: While discussing about ‘self’ and ‘non-self’, we got a broad idea of antigen. Definition and Properties of an antigen An antigen is any foreign molecule that can…

Defence Mechanisms in the Body There are four defence mechanisms in our body Immunity to defend the body from infections. Metabolic defence to metabolize and detoxify foreign chemicals. Stoppage of…

Biology – A Science of Exceptions Physical Sciences have sets of principles or laws which are universal in their application, on the other hand life sciences have very few universally…