Question

Which of the following is an example of a single cell that does not function as a full-fledged organism?
a. White blood cell (WBC)
b. Amoeba
c. WBC and Amoeba
d. Paramecium
(A) b only
(B) b and d
(C) a only
(D) c and d

Answer 1

Hint: The full-fledged organism has all the characteristics to behave in an independent way. It has the ability to reproduce, divide on its own. It also performs the cell division, various metabolic processes of the body to complete its life cycle.

Complete answer:
The white blood cells provide the immune system for the body and act against the pathogens that enter into the body. White blood cells work independently unlike the normal cells of the body. WBC cells are single cellular organisms without any restrictions, they move and capture the target things on their own. These cells have a movement similar to that of the unicellular organism’s amoeba, but they do not have any tendency to divide and reproduce on their own like amoeba and the paramecium does.

These cells are produced by the bone marrow. When the pathogens like bacteria, virus etc. enters the body of the host, these white blood cells or the leucocytes moves towards the target organisms and engulf those pathogens in its body and kills it. Hence, they are called as the police force of the body. Except white blood cells, the other organism’s functions as the full- fledged organisms.

Hence, the correct answer is Option (C)

Note: The white blood cells are classified into five types as the neutrophils, eosinophils, basophils, lymphocytes and monocytes. In which the monocytes and the neutrophils are phagocytic in nature. Again, the lymphocytes are classified into B cells and the T cells.