In nature, allogamy is met with in _____surely

Options

A. unisexual flowers
B. Neutral flowers
C. Underground flowers
D. Bisexual flower

Answer

To answer the question "In nature, allogamy is met with _____ surely," we need to understand the concept of allogamy and its relation to different types of flowers.

### Step-by-Step Solution:

1. **Define Allogamy**:
Allogamy refers to the process of cross-pollination, which involves the transfer of pollen from the anther of one flower to the stigma of another flower. This can occur in two forms:
- **Geitonogamy**: Pollen transfer between different flowers on the same plant.
- **Xenogamy**: Pollen transfer between flowers of different plants.

2. **Identify the Types of Flowers**:
We have four options to consider:
- **Unisexual flowers**: Flowers that have either male (staminate) or female (pistillate) reproductive organs, but not both.
- **Neutral flowers**: Flowers that lack both stamens and carpels, thus have no reproductive structures.
- **Underground flowers**: Typically found in certain plant families like orchids, which may not facilitate allogamy.
- **Bisexual flowers**: Flowers that contain both male and female reproductive organs, allowing for self-pollination.

3. **Analyze Each Option**:
- **Unisexual flowers**: Since these flowers have either male or female parts, they require another flower (of the opposite sex) for pollination, making them suitable for allogamy.
- **Neutral flowers**: These lack reproductive structures, so they cannot participate in pollination.
- **Underground flowers**: These are not typically associated with allogamy as they may not facilitate effective pollination.
- **Bisexual flowers**: These can self-pollinate, which does not align with the definition of allogamy.

4. **Conclusion**:
Based on the analysis, the only type of flower that ensures allogamy is unisexual flowers, as they require cross-pollination with another flower of the opposite sex for reproduction.

### Final Answer:
In nature, allogamy is met with **unisexual flowers** surely.