select the odd one w.r.t. members of class 'Pteropsida'.

Options

A. dryopteris
B. pteris
C. Adiantum
D. selaginella

Answer

To solve the question of selecting the odd one out with respect to members of the class 'Pteropsida', we will follow these steps:

### Step 1: Understand the Classification
- Pteropsida is a subclass of pteridophytes, which are vascular plants.
- Pteridophytes are divided into several subclasses, including Psilotopsida, Lycopsida, and Pteropsida.

**Hint:** Familiarize yourself with the classification of pteridophytes and the subclasses they belong to.

### Step 2: Analyze the Options
- The options given are:
1. Dryopteris
2. Pteris
3. Adiantum
4. Selaginella

**Hint:** Write down the classification of each option to determine their group.

### Step 3: Identify the Members of Pteropsida
- Dryopteris, Pteris, and Adiantum are all members of the Pteropsida subclass. They are advanced pteridophytes.

**Hint:** Look for characteristics that define members of Pteropsida.

### Step 4: Identify the Odd One Out
- Selaginella, while being a pteridophyte, belongs to the Lycopsida subclass, not Pteropsida.

**Hint:** Compare the characteristics of Selaginella with those of the other three options.

### Step 5: Conclusion
- Since Selaginella is the only option that does not belong to the Pteropsida subclass, it is the odd one out.

**Final Answer:** Selaginella is the odd one with respect to members of the class Pteropsida.