parasitism

The video tutorial explains parasitism, a relationship where one organism benefits at the expense of another. It introduces the concept of parasites and hosts, using mosquitoes as an example of parasites that cause malaria. The tutorial classifies parasites into external and internal types, providing examples such as lampreys and fleas for external parasites, and bilharzias and filarial worms for internal parasites. It highlights the diseases caused by these parasites and emphasizes the importance of maintaining good health to prevent infections.

What is the relationship called when one organism benefits at the expense of another?

• Commensalism

• Symbiosis

• Mutualism

• Parasitism

Which of the following is an example of an external parasite?

• Ascaris worms

• Jawless lamprey

• Bilharzias

• Filarial worms

How do internal parasites typically affect their hosts?

• By living on the host's skin

• By sharing the host's digested food or feeding on tissues

• By causing external wounds

• By providing nutrients to the host

Which disease is caused by filarial worms?

• Smallpox

• Elephantiasis

• Malaria

• Anemia

What is a common way to prevent infection by parasites?

• Avoiding cooked food

• Eating raw fish

• Swimming in freshwater

• Maintaining good hygiene