Spindle shaped male gametes are found in

Options

A. Lycopodium
B. Pteris
C. Pteridium
D. Selaginella

Answer

To solve the question "Spindle shaped male gametes are found in," we will follow these steps:

### Step 1: Understand the Question
The question is asking about the organism that produces spindle-shaped male gametes, which are also known as antherozoids.

**Hint:** Look for keywords like "spindle shaped" and "male gametes" to identify the type of reproductive structures.

### Step 2: Analyze the Options
We have four options to consider:
1. Lycopodium
2. Terres
3. Teridium
4. Silaginella

**Hint:** Familiarize yourself with the reproductive structures of each of these organisms, particularly focusing on their male gametes.

### Step 3: Recall Information About Antherozoids
Antherozoids are the male gametes in certain plants. They can vary in shape and size depending on the species. In this case, we are looking for spindle-shaped male gametes.

**Hint:** Remember that antherozoids are produced by male gametophytes in vascular plants.

### Step 4: Identify the Correct Organism
From the information provided:
- Antherozoids are found in **Silaginella**.
- They are the smallest among vascular plants, with a diameter of about 15 to 50 picometers and biflagellated (having two flagella).

**Hint:** Consider which of the options is known for having small, spindle-shaped male gametes.

### Step 5: Conclusion
Based on the analysis, the correct answer is **Silaginella** (option 4), as it is the organism that produces spindle-shaped male gametes (antherozoids).

**Final Answer:** Spindle shaped male gametes are found in **Silaginella**.