Question

Which one of the following protozoan parasites belongs to the phylum Apicomplexa?

• A. Toxoplasma gondii
• B. Leishmania donovani
• C. Entamoeba histolytica
• D. Trichomonas vaginalis

Hint:

In taxonomy, always check the classification and characteristics of organisms to determine their correct phylum.

Answer 1

The Correct Option is A

Step 1: Understanding the Phylum Apicomplexa.
The phylum Apicomplexa includes protozoan parasites that have a complex life cycle and are known for causing various diseases. The most notable of these are Toxoplasma gondii and Plasmodium species.

Step 2: Analyzing the options.
(A) Toxoplasma gondii: Correct — Toxoplasma gondii is a well-known protozoan parasite in the Apicomplexa phylum.
(B) Leishmania donovani: This belongs to the phylum Euglenozoa, not Apicomplexa.
(C) Entamoeba histolytica: This belongs to the phylum Amoebozoa.
(D) Trichomonas vaginalis: This belongs to the phylum Parabasalida, not Apicomplexa.

Step 3: Conclusion.
The correct answer is (A) Toxoplasma gondii, as it belongs to the Apicomplexa phylum.