Which of the following is correct about class Deuteromycetes?

Options

A. Some members are saprophytes or parasites
B. A large number of members are decomposers of litter and help in mineral cycling
C. Alternaria, Colletotrichum and Trichoderma are deuteromycetes
D. All

Answer

To determine which statements about class Deuteromycetes are correct, we will analyze each option provided in the question step by step.

### Step 1: Understanding Deuteromycetes
Deuteromycetes, also known as "imperfect fungi," are a class of fungi characterized by the absence of a known sexual reproductive stage. This makes their classification somewhat provisional, as they may be reclassified into other fungal groups if their sexual reproduction is discovered.

**Hint:** Remember that Deuteromycetes are called "imperfect fungi" due to the lack of sexual reproduction.

### Step 2: Analyzing Option 1
Option 1 states that "Some members are saprophytes or parasites."
- This is correct. Deuteromycetes include both saprophytic fungi, which decompose organic matter, and parasitic fungi, which derive nutrients from living hosts.

**Hint:** Consider the ecological roles of fungi when evaluating their classification.

### Step 3: Analyzing Option 2
Option 2 claims that "A large number of members are decomposers of litter and help in mineral cycling."
- This statement is also correct. Many Deuteromycetes play a vital role in breaking down organic matter in the environment, thus contributing to nutrient cycling.

**Hint:** Think about the importance of decomposers in ecosystems and their role in recycling nutrients.

### Step 4: Analyzing Option 3
Option 3 lists "Alternaria, Colletotrichum, and Trichoderma" as examples of Deuteromycetes.
- This is true. All three mentioned genera are well-known members of Deuteromycetes and are studied for their roles in agriculture and ecology.

**Hint:** Familiarize yourself with common genera of Deuteromycetes to understand their significance.

### Step 5: Conclusion
Since all three options (1, 2, and 3) are correct, we conclude that the correct answer to the question is option 4, which states "All."

**Final Answer:** The correct answer is option 4: All.