Giardia is classified as what type of organism?

Prepare for the NLN PAX Science Exam with flashcards and multiple choice questions. Each question includes hints and detailed explanations to boost your confidence and exam readiness.

Multiple Choice

Giardia is classified as what type of organism?

Explanation:
The main idea here is that Giardia is a protozoan, a single-celled, eukaryotic microorganism that often lives as a parasite. Giardia has a true nucleus and membrane-bound organelles, and it moves with flagella. It exists in two forms—trophozoite and cyst—that allow it to live in the intestine of hosts and survive in the environment. This sets it apart from other options: bacteria are prokaryotes without a nucleus, viruses are acellular and require a host to replicate, and fungi are eukaryotes that are usually multicellular (or yeast-like) with different cell-wall composition and life cycles.

The main idea here is that Giardia is a protozoan, a single-celled, eukaryotic microorganism that often lives as a parasite. Giardia has a true nucleus and membrane-bound organelles, and it moves with flagella. It exists in two forms—trophozoite and cyst—that allow it to live in the intestine of hosts and survive in the environment. This sets it apart from other options: bacteria are prokaryotes without a nucleus, viruses are acellular and require a host to replicate, and fungi are eukaryotes that are usually multicellular (or yeast-like) with different cell-wall composition and life cycles.

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