Which of the following are "unicellular" organisms?
(A) Plasmodium
(B) Protozoa
(C) Spirogyra
(D) Leishmania
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A), (B) and (D) only
A unicellular organism is made of a single cell, which carries out all the life processes; a multicellular organism is made of many cells.
(A) Plasmodium Correct. It is a single-celled protozoan parasite that causes malaria and is spread by the female Anopheles mosquito.
(B) Protozoa Correct. Protozoa are a group of single-celled organisms with a nucleus, such as Amoeba and Paramecium.
(C) Spirogyra Incorrect. It is a multicellular green alga; its cells are joined end to end in long, thread-like filaments.
(D) Leishmania Correct. It is a single-celled protozoan with a flagellum that causes kala-azar and is spread by the sandfly.