Why do living things need energy

What are some examples of living and non living things which do or do not have energy? Energy comes in all kinds of different forms and can be converted from one form to another. Energy can be in several of these categories at once.

Why do living things need energy

Winds Living things obtain and use energy Cells cannot survive on their own. They need power to stay alive. They need energy to perform functions such as growth, maintaining balance, repair, reproduction, movement and defense.

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This means all living organisms must obtain and use energy to live. Energy is the power to do things. This power comes in many ways and forms, but they can all be linked to the sun.

It is the source of all energy. A living organism can either make its own food or depend on others to make food for them. For example green plants produce their own food from a process called photosynthesis. They use the chloroplasts in their cells to capture energy in sunlight.

They combine it with water and carbon dioxide from the air to produce sugars for themselves. Green plants are therefore known as producers or autotrophs. Bacteria can also make their own food or breakdown food. Other organisms eat green plants which has a store of the energy they produce to obtain energy.

They are known as consumers or heterotrophs. Rabbits and sheep are examples of consumers. Herbivores, carnivores and omnivores are all consumers, and they all have to go find food to give them energy.

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The process of obtaining and using energy by living organisms are best explained by three important scientific terms namely Anabolism, Catabolism and Metabolism. Take a look at the illustration below: Anabolism constructive anabolism This is a process where by living organisms use simpler substances to put together, or build complex substances such as carbohydrates, proteins and fats for storage.

Such an activity is known as an anabolic activity. Catabolism destructive catabolism This is when the cells in living organisms, breakdown complex substances and molecules into simpler substances, often to release energy for use.

Metabolism This is the sum of all the chemical reactions anabolic and catabolic activities that go on in the cells of living organisms. It is a continous process because the moment metabolism stops, the living organism will die.What do Isaac Newton, Nikola Tesla, and William Shakespeare have in common?

They are all great geniuses of the world.

Why do living things need energy

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Why do living things need energy

A recent survey asked “All things considered, do you think the world is getting better or worse, or neither getting better nor worse?”. In Sweden 10% thought things are getting better, in the US they were only 6%, and in Germany only 4%. Very few people think that the world is getting better.

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