Question

_______ flower has both androecium and gynoecium

Answer 1

Hint: The androecium comprises the stamens. Each stamen consists of an anther and a filament. The gynoecium is the female reproductive organ, including the carpels. Carpels are structures that are made from a stigma and an ovary that contain one or more ovules. Some flowers have both androecium and gynoecium in them and some flowers have either androecium or gynoecium.

Complete answer:
If a flower has both androecium and gynoecium present in it, they are known as bisexual flower. They are also called as perfect flowers. Bisexual flowers contain both pistils and stamens in the same flower. Hence, bisexual flowers are called androgynous or hermaphrodite flowers as well.

In bisexual plants, both cross pollination and self pollination can occur due to the presence of both the reproductive organs in the same flower itself. During self pollination, the stigma of the plant is pollinated by pollen grains of a genetically identical flower. Hence, genetically identical offspring are produced by self pollination. It occurs in three ways: autogamy, cleistogamy and geitonogamy. The pollination within the same flower is known as autogamy. The pollination between different flowers on the same plant is known as Geitonogamy. Cleistogamy is pollination of the flower before its opening.
Many plants have complete flowers with both female and male parts, others only have female or male parts, and still, other plants have flowers on the same plant that are a mix of female and male flowers. Some plants even include all three types of flowers, where some flowers are the only female, some are only male and some are both female and male.

Note: Unisexual flowers are also known as incomplete flowers, containing either female or male reproductive organs in the flower. That means, the male reproductive structure or the androecium, and gynoecium - the female reproductive structure, are found in separate flowers.