Question

Which among the following statement(s) is/are correct for unicellular organisms?

• A. Paramoecium consists of a single cell.
• B. Vital functions like respiration, nutrition, etc., are carried out by a single cell in chrysanthemum.
• C. Vital functions like digestion, nutrition, etc., in amoeba are carried out by a single cell.
• D. Paramoecium consists of clusters of cells.

Answer 1

Answer: (A), (C)

Vital functions like digestion, nutrition, etc., in amoeba are carried out by a single cell.

• Unicellular organism like amoeba, paramoecium, etc., consists of a single cell. So, all the vital functions like nutrition, digestion, excretion, reproduction, etc., are carried out by that single cell.
• Multicellular organisms consists of many cells. Different cells carry out various specialised functions in these organisms. E.g., chrysanthemum (a plant), humans, etc.