Biology

Viruses; characteristics, structure and life cycle

Viruses In 1852, the Russian botanist D.I Ivanovsky prepared an infectious extract from tobacco plants that were passed through a filter able to prevent the passage of bacteria, the filtered fluid was still infectious. In 1898 the Dutchman Beijerink coined the name ‘virus’ (Latin for poison) to describe the infectious nature of certain filtered plant …

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Characteristics and structure of prokaryote / bacteria

Prokaryotae e.g. bacteria In this article we shall see the main features of a prokaryote (bacteria), its structure and organelles, shape, nutrition, bacterial reproduction and the growth form of bacteria. The kingdom prokaryotae is made up of organisms commonly known as bacteria. They are the most ancient group of organisms, having appeared about 3.5billion years …

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Classification of living organisms into kingdoms

History of the Classification of organisms into  kingdoms Until relatively recently it was generally agreed that all living organisms should be placed into two kingdoms, the animal and plant kingdoms. The basic different between plants and animals was that animals fed on organic material (are heterotrophic) whereas plants synthesized their own organic requirements from inorganic …

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What is Adaptation?

Generally, organisms develop features that enable them to live (adapt) successfully and reproduce in a particular environment.  These features may be as a result of changes in structure, functions or behaviors for the purpose of survival in an environment. Definition of Adaptation Adaptation is simply defined as the ability of an organism to survive in …

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