In which of the following plant, pollination occurs by the act of pseudocopulation?

Options

A. Salvia
B. Opuntia
C. Ophrys
D. Aristolochia

Answer

To answer the question "In which of the following plants does pollination occur by the act of pseudocopulation?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand Pseudocopulation**:
- Pseudocopulation refers to the behavior where male insects attempt to copulate with flowers that mimic the appearance or scent of female insects. This does not result in actual fertilization but facilitates the transfer of pollen.

2. **Identify the Options**:
- We need to evaluate the given options to determine which plant is known for pseudocopulation.

3. **Evaluate Each Option**:
- **Option 1: Salvia**:
- Salvia does not exhibit pseudocopulation. Pollination occurs through other means, such as wind or insects, but not through mimicry that leads to copulation attempts.
- **Option 2: Opuntia**:
- Opuntia (cactus) also does not rely on pseudocopulation. It has its own mechanisms for pollination that do not involve mimicry.
- **Option 3: Ophiris**:
- Ophiris (a type of orchid) is known for pseudocopulation. Male insects, particularly certain species of bees, attempt to mate with the flower, mistaking it for a female, which leads to pollen transfer.
- **Option 4: Aristotelosia**:
- Aristotelosia does not exhibit pseudocopulation either. It has different pollination strategies that do not involve mimicry.

4. **Conclusion**:
- Based on the evaluation, the plant where pollination occurs by the act of pseudocopulation is **Ophiris**.

### Final Answer:
- The correct answer is **Option 3: Ophiris**.