Question

Refer was given figure of Paramecium caudatum and select the option that correctly identifies A, B, C and D.

• A. A - Cell wall, B - Cilia Contractile, C - vacuole, D - Cytostome
• B. A - Pellicle, B - Cilia, C - Contractile vacuole, D - Cytostome
• C. A - Pellicle, B - Cilia, C - Macronudeus, D - Cytostome
• D. A - Pellicle, B - Trichocysts, C - Micronucleus, D - Cytopharynx

Answer 1

The correct option is C A - Pellicle, B - Cilia, C - Macronudeus, D - Cytostome

• Paramecium is a single cell eukaryote belonging to kingdom Protista, mostly found in the freshwater environment.
• The pellicle is a stiff but elastic membrane that gives a definite shape to the paramecium.
• A cilium is a short, hair-like structure that protrudes from organism's cell membrane. A paramecium has thousands of cilia that rhythmically beat, providing a way for it to move around and to sweep food into its oral groove.
• The macronucleus is the larger type of nucleus in ciliates which is responsible for the genetic reorganization that occurs during conjugation.
• A cytostome or cell mouth is a part of the cell which is specialized for phagocytosis, usually in the form of a groove. Food is directed into the cytostome.

So, the correct answer is 'A- Pellicle, B- Cilia, C- Macronucleus, D- Cytostome'.