Question

Choose the correct statements among the following:
1. White spots on leaves are due to Puccinia.
2. Mycelium with multinucleated cytoplasm is called coenocytic.
3. Bacteria produce endospores under unfavourable conditions.
4. Gonyaulax release toxins to kill fish.
Identify the correct option from the following:

• A. I, II, III
• B. II, III, IV
• C. I, III, IV
• D. I, II, IV

Hint:

When evaluating multiple statements, eliminate the clearly incorrect ones first. Then verify the accuracy of the rest before selecting the final answer.

Answer 1

The Correct Option is B

Statement I: Incorrect. White spots on leaves are typically caused by {Erysiphe} (powdery mildew), not {Puccinia} which causes rust. Statement II: Correct. A coenocytic mycelium contains multiple nuclei in a shared cytoplasm without cross walls. Statement III: Correct. Bacteria form endospores in adverse conditions to survive harsh environments. Statement IV: Correct. {Gonyaulax}, a dinoflagellate, releases toxins harmful to fish (red tide phenomenon).