O Level Biology Mechanisms of ventilation in the Human lungs       This is the  method  that  pumps air […]

Factors affecting the rate of  Transpiration  in plants   Environmental  factors         Light intensity  High light intensity  […]

Structure And Functions of the different part of the Human Eye         image  copyright  from https://thehumanevolutionblog.com/2015/01/12/the-poor-design-of-the-human-eye/   […]

Types of Demand       Joint or complimentary  demand This  is demand  for a commodity  to complete  the demand […]

  Factors affecting the price elasticity of demand         1.Availability of close substituted Goods which  have  close  […]

Factors   affecting  supply       1.The  price  of the  commodity : The higher  the price  of a commodity  , the […]

  Devaluation   Definition Devaluation  id define as  the fall  in the exchange  value  of a currency  in terms  of […]

Banking   Definition Banking constitute the services  of financial  Institutions such as commercial  banks .loans  association  and credit  union .A  […]

    INTRODUCTION   Virus (computer), a self-duplicating computer program that spreads from computer to computer, interfering with data and […]

A wave is a phenomenon in which energy is transferred through vibrations Properties of waves: 1. The source of any […]