Biology

Key Words for Further Up The Food Chain

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Parasite

a Parasite is an organism that lives off another organism.

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Mutualism

Mutualsim is where both organisms benifit.

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Commensalism

Commensalism is where one organsim benifits whereas the other is neither harmed nor benifited.

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Natural Selection

The process in nature by which, according to Darwin's theory of evolution, only the organisms best adapted to their environment tend to survive and transmit their genetic characteristics in increasing numbers to succeeding generations while those less adapted tend to be eliminated.

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Tapeworm

Tapewroms are often very long flatworms that are parasitic in the intestines of vertebrates, including humans.

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Host

an organism that another organsim lives off.

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Protozoan

Any of a large group of single-celled, usually microscopic, eukaryotic organisms, such as amoebas, ciliates, flagellates, and sporozoans.

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Malaria

Malaria is an infectious disease characterized by chills, fever, and sweating, caused by a protozoan of the genus Plasmodium in red blood cells, which is transmitted to humans by the bite of an infected female anopheles mosquito.

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Sickle Cell Anaemia

A hereditary blood disease characterized by abnormal red blood cells that are sickle-shaped. The red blood cells are inefficient at carrying oxygen and are rapidly removed from the circulation, causing anaemia.

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Haemoglobin

The iron-containing respiratory pigment in red blood cells of vertebrates.

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Recessive

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Dominant

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Carrier

A person or an animal that shows no symptoms of a disease but harbors the infectious agent of that disease and is capable of transmitting it to others.

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