Life
Micro-organisms
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Micro-organisms
Micro-organisms (also known as microbes) are life-forms that cannot be seen by the naked eye. They include archaea, bacteria, protists and some kinds of algae and fungi...
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Algae
Algae are simple, plant-like protists. An alga has no proper roots, stem or leaves, although it may have a stem-like part and a leaf-like blade. It absorbs water and nutrients...
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Bacteria
The commonest living things are bacteria. They are too small to see without a microscope. Bacteria are all around us in their billions. They are found in every habitat on Earth...
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Protists
Like bacteria, protists are microscopic, single-celled organisms. But unlike bacteria, each protist has its genetic material (DNA) wrapped inside a bag-like membrane to form the...
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Moulds and yeasts
Moulds and yeasts are two groups of micro-organisms that belong to the fungi kingdom. Found in dark, damp environments, moulds grow thin, pale threads called hyphae forming a...
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Viruses
The smallest living things are viruses. They are “alive” only because they can produce more of their kind if they invade another living thing. Viruses cannot reproduce on their...
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Micro-organisms A-Z