Biology

a Parasite is an organism that lives off another organism.

Mutualsim is where both organisms benifit.

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

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.

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

an organism that another organsim lives off.

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

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.

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.

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

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.