Question

Signet ring stage is found in

• A. Plasmodium
• B. Euglena
• C. Pelomyxa
• D. Paramecium

Answer 1

Answer: (A)

Plasmodium

Answer 2

In Plasmodium life cycle, when metacryptozoite enters into an erythrocyte $(RBC)$, it becomes a rounded young trophozoite. As it grows, a large non contractile vacuole appears in its centre in its centre, pushing the cytoplasm and nucleus to a thin peripheral layer to give a signet-ring appearance to the trophozoite.