Question

Which of the following statement about Fungi are correct ? A. Dimorphic fungi can exist as unicellular yeast like as well as filamentous mold form.
B. Most fungi prefer an alkaline pH for growth.
C. Fungi are eukaryotic, spore bearing, photosynthetic organisms.
D. Conidiospores are sexual spores of fungi.
E. Some fungi can capture nematodes and kill them.
Choose the correct answer from the options given below :

• A. \(A \text{ and } E\) only
• B. \(C \text{ and } D\) only
• C. \(C\) only
• D. \(B \text{ and } C\) only

Hint:

Remember:
• Dimorphic fungi \(\rightarrow\) Yeast + mold forms
• Conidia \(\rightarrow\) Asexual spores
• Fungi are:
• Eukaryotic
• Heterotrophic
• Non-photosynthetic \[ \text{Some fungi are nematode-trapping predators} \]

Answer 1

The Correct Option is A

Concept: Fungi are eukaryotic heterotrophic organisms that reproduce by spores. They include:
• Yeasts
• Molds
• Mushrooms Fungi generally:
• Lack chlorophyll
• Prefer slightly acidic environments
• Reproduce through sexual and asexual spores

Step 1: Evaluating statement A. Statement A: \[ \text{Dimorphic fungi exist as yeast and mold forms} \] This is correct. Dimorphic fungi can switch between:
• Unicellular yeast form
• Filamentous mold form depending on environmental conditions such as temperature. Thus: \[ \boxed{A \text{ is correct}} \]

Step 2: Evaluating statement B. Statement B: \[ \text{Most fungi prefer alkaline pH} \] This is incorrect. Most fungi prefer: \[ \text{Slightly acidic pH} \] usually around: \[ pH\ 5 - 6 \] Thus: \[ \boxed{B \text{ is incorrect}} \]

Step 3: Evaluating statement C. Statement C: \[ \text{Fungi are photosynthetic organisms} \] This is incorrect. Fungi are: \[ \text{Non-photosynthetic heterotrophs} \] because they lack chlorophyll. Thus: \[ \boxed{C \text{ is incorrect}} \]

Step 4: Evaluating statement D. Statement D: \[ \text{Conidiospores are sexual spores} \] This is incorrect. Conidiospores (conidia) are: \[ \text{Asexual spores} \] produced externally on conidiophores. Thus: \[ \boxed{D \text{ is incorrect}} \]

Step 5: Evaluating statement E. Statement E: \[ \text{Some fungi capture and kill nematodes} \] This is correct. Certain predatory fungi form:
• Adhesive nets
• Constricting rings to trap nematodes. Thus: \[ \boxed{E \text{ is correct}} \] Therefore, the correct statements are: \[ \boxed{A \text{ and } E} \] Hence, the correct answer is: \[ \boxed{(A)\ A \text{ and } E \text{ only}} \]