What is a protozoa?

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Prepare for the PLTW Biomedical Science Test. Study with flashcards and multiple choice questions, each question comes with hints and explanations. Get ready for your exam!

Multiple Choice

What is a protozoa?

Explanation:
Protozoa are one-celled, eukaryotic organisms that can cause disease in humans. They may live as parasites inside a host or survive freely in the environment. This description captures why they’re distinct from other types of microbes: viruses aren’t cells at all and can’t replicate on their own; bacteria are single cells but are prokaryotic and lack a defined nucleus; multicellular organisms are made of many cells. Protozoa, as single cells with a nucleus and complex internal structures, can lead to a range of illnesses from mild to serious, with examples like malaria, amoebic dysentery, and giardiasis illustrating their impact.

Protozoa are one-celled, eukaryotic organisms that can cause disease in humans. They may live as parasites inside a host or survive freely in the environment. This description captures why they’re distinct from other types of microbes: viruses aren’t cells at all and can’t replicate on their own; bacteria are single cells but are prokaryotic and lack a defined nucleus; multicellular organisms are made of many cells. Protozoa, as single cells with a nucleus and complex internal structures, can lead to a range of illnesses from mild to serious, with examples like malaria, amoebic dysentery, and giardiasis illustrating their impact.

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