In the ovule
Explanation
In flowering plants (angiosperms), the flower is the reproductive unit. The female reproductive organ is the pistil (or carpel), which consists of three parts: the stigma, the style, and the ovary. Sexual reproduction involves the fusion of the male gamete with the female gamete (egg cell).
Detailed Analysis
- In the stigma is incorrect: The stigma is the terminal part of the pistil. It serves as the receptive surface or landing platform for pollen grains during pollination but does not contain the female gamete.
- In the style is incorrect: The style is the elongated, slender tube that connects the stigma to the ovary. It provides a pathway for the pollen tube to grow towards the ovary but does not house the gamete.
- In the ovule is correct: The ovule (megasporangium) is located inside the ovarian cavity. Within the ovule, the embryo sac (female gametophyte) develops. The female gamete (egg cell) is situated inside this embryo sac. Therefore, prior to fertilization, the female gamete is located within the ovule.
- In the filament is incorrect: The filament is the long, slender stalk of the stamen, which is the male reproductive unit. It supports the anther, where pollen grains are produced. It is not part of the female reproductive structure.
Key Takeaway
The female gamete (egg cell) in angiosperms is located within the embryo sac, which is contained inside the ovule found within the ovary.