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Biodiversity

Learning Outcomes  👉 What is biodiversity  👉 Origin of biodiversity  👉 Nature of biodiversity  👉 Interrelationships of organisms  👉 How to measure biodiversity  👉 Biodiversity of Bangladesh  👉 Risks and remedies of biodiversity  What is Biodiversity? The term biodiversity describes the great variety of life on Earth. Biodiversity refers to the variety of living things, including plants, animals, and microorganisms. We don't know for sure exactly how many different organisms there are on Earth. However, scientists estimate that there are about 8-14 million (80 to 140 lakh) different species of organisms on this Earth. Some believe that the number is higher. But whatever the number, most of these organisms are unknown to us. Only 1.2 million (12 lakh) species have been identified and described so far, most of which are insects. This means that billions of other organisms are still mysterious and unknown to us. Origin of Biodiversity The unique characteristics of all sp
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What is elasticity?

What is elasticity?

If an external force is applied to an object and it changes or tries to change the shape and size of the object, the property of the object that obstructs this tendency of deformation, and if the force is taken away the object regains its original size and shape is elasticity. Those objects that have this property are known as elastic bodies.

or, 

When force is applied on an object, a deformation happens inside it (and for this deformation, a counter force is created). If the force is withdrawn, deformation stops and the object comes back to its initial condition. This property of a substance is known as elasticity.

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