Question

Study the given figure showing structure of Euglena and select the option that correctly identifies A, B, C and D.

• A. A - Cytostome, B - Photoreceptor, C - Paramylum bodies, D - Myonemes
• B. A - Contractile vacuole, B - Photoreceptor, C - Paramylum bodies, D - Chloroplast
• C. A - Cytostome, B - Stigma, C - Paramylum bodies, D - Chloroplast
• D. A - Cytostome, B - Stigma, C - Myonemes, D - Chloroplast

Answer 1

The correct option is C A - Cytostome, B - Stigma, C - Paramylum bodies, D - Chloroplast

• Euglena is a eukaryotic, unicellular organism, it contains major organelles found in a more complex life.
  
• Cytostome or cell mouth is a part of cell specialized for phagocytosis, usually in the form of a groove. Food is directed into the cytostome.
• Stigma is the light-sensitive part of euglena which appears as a fine spot and helps the euglena to move towards the light.
• Paramylum is stored in rod-like bodies throughout the cytoplasm called paramylum bodies which are often visible as colorless particles in light microscopy. Their shape is often characteristic of euglena species that produce them.
• The euglena is unique because it is both heterotrophic and autotrophic. Chloroplasts within euglena trap sunlight which is used for photosynthesis and can be seen as several rod-like structures throughout the cell.

So, the correct answer is 'A- Cytostome, B- Stigma, C- Paramylum bodies, D- Chloroplast'.