Question

Identify the wrongly paired options given below regarding the shape of plastids. A. Girdle shaped in Ulothrix B. Reticulate in Cladophora C. Discoid in Oedogonium D. Spiral in Hydrodictyon E. Stellate in Zygnema. Choose the correct answer from the options given below:

• A. B only
• B. C and D only
• C. A, D and E only
• D. B, C and D only

Hint:

Review the typical plastid shapes for each algae type listed.

Answer 1

The Correct Option is B

Step 1: Concept
Plastid Shapes

Step 2: Meaning
This question tests the knowledge of the various shapes that plastids can have in different types of algae.

Step 3: Analysis
Option A is correct as Ulothrix has girdle-shaped chloroplasts. Option B is incorrect because Cladophora typically has reticulate (net-like) chloroplasts, not discoid or spiral. Options C and D are correct as Oedogonium has discoid chloroplasts and Hydrodictyon often has spiral chloroplasts. Option E is also correct as Zygnema can have stellate (star-shaped) chloroplasts.

Step 4: Conclusion
The wrongly paired options in the given context are B only, since it incorrectly pairs Cladophora with discoid chloroplasts instead of reticulate. Final Answer: (B)