Which of the following lists correctly identifies the four major groups of protozoans based on their mode of locomotion?

• A. Algae, fungi, protozoa, helminths
• B. Ciliates, helminths, amoeboids, algae
• C. Bacteria, archaea, fungi, viruses
• D. Amoeboids, ciliates, flagellates, sporozoans

Answer: (D)

Verified step by step guidance

1. Understand that protozoans are classified based on their mode of locomotion, which refers to how they move.
2. Recall the four major groups of protozoans: Amoeboids (move by pseudopodia), Ciliates (move using cilia), Flagellates (move using flagella), and Sporozoans (non-motile, often parasitic).
3. Review each option given and identify whether the groups listed correspond to these locomotion-based categories.
4. Eliminate options that include groups not related to protozoan locomotion, such as algae, fungi, helminths, bacteria, archaea, and viruses, since these are different types of organisms or classifications.
5. Confirm that the correct list includes only Amoeboids, Ciliates, Flagellates, and Sporozoans, as these represent the major protozoan groups classified by their movement.