A bisexual flower is a flower that contains both stamens and carpels. To understand this answer, let's break it down into the following sections:

1. What are stamens and carpels?
- Stamens are the male reproductive organs of a flower. They consist of a filament and an anther. The anther produces pollen, which contains the male gametes.
- Carpels, also known as pistils, are the female reproductive organs of a flower. They consist of three parts: the stigma, the style, and the ovary. The stigma is the sticky surface where pollen grains land. The style connects the stigma to the ovary, and the ovary contains the ovules, which are the female gametes.

2. Bisexual flowers:
- Bisexual flowers, also called perfect flowers, have both stamens and carpels. This means that they have the male and female reproductive parts within the same flower.
- In bisexual flowers, the stamens and carpels are usually arranged in a specific pattern. They may be located in the same whorl or in different whorls of the flower.

3. Benefits of bisexual flowers:
- Bisexual flowers have the advantage of self-pollination, as they can produce both male and female gametes within the same flower.
- This allows for efficient reproduction, especially in environments with limited pollinators or unfavorable conditions.
- Self-pollination ensures that the flower can produce seeds and offspring without relying on external factors.

4. Examples of bisexual flowers:
- Many common flowering plants have bisexual flowers. Examples include roses, sunflowers, lilies, daisies, and orchids.
- In these flowers, you can observe both the stamens and carpels present in the same flower structure.

In conclusion, a bisexual flower contains both stamens and carpels. This enables the flower to have both male and female reproductive organs within the same structure, allowing for efficient self-pollination and reproductive success.

The bisexual flowers contain both stemens as well as carpels because they are able to produce both male and female buds and are hermaphrodite.
And it is because if it contains only carpels it is infused to form single pistil.