EVERYDAY SCIENCE

Detailed explanation-1: -Parasitism is a close relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist E. O. Wilson has characterised parasites as “predators that eat prey in units of less than one".

Detailed explanation-2: -Parasitism is a nonmutual relationship between two organisms in which one benefits at the expense of the other. There are two types of parasites affecting living organisms: ectoparasites (living on the surface of host) and endoparasites (living in the body of host).

Detailed explanation-3: -Parasitism, grazing, and predation are the three major ways in which species feed on one another. The parasite lives on and feeds off its host, usually decreasing the host’s ability to survive but not killing it outright.

Detailed explanation-4: -a) Parasitism. b) Commensalism. c) Mutualism. d) Competition. Explanation: A relationship between organisms of different species where an organism is benefited and other is harmed is known as parasitism.

Detailed explanation-5: -The organisms that parasitize humans include fungi, leeches, lice, viruses, protozoa, tapeworm, etc. Few organisms such as Helminthes live inside the intestine of the host and causes several infectious diseases, such as jaundice, malnutrition, diarrhoea, etc. All the infections are caused by viruses and bacteria.