Sexual Reproduction in Flowering Plants
Sexual Reproduction in Flowering Plants
Types of Flowers: Flowers can be of the following types based on or absence of stamens and pistils:
Sexual Flowers:
These flowers contain either stamens or pistils. It means these flowers do not have all the four whorls i.e. sepals, petals, androecium (stamens) and gynoecium (pistils). These are also called incomplete flowers. For example, the flowers of plants like sunflower, castor, cucumber, bottlegourd (lauki), and bittergourd (karela) are unisexual.
Bisexual flowers: These flowers have both stamens and pistils. It means bisexual have all the four whorls present. So, these are also called complete flowers. For example, flowers of rose, oleander, hibiscus, sweet pea and temple flower are bisexual
· Flowers are the reproductive organs of plants.
· A flower contains both male and female reproductive cells called gametes. These flowers are called bisexual flowers.
· When flowers have either male gametes or female gametes, they are called unisexual flowers.
· Flower has four parts- sepals, petals, stamens and pistils.
Sepals and petals are called non-essential whorls as they are not directly involved in reproduction. They only help in attracting insects for pollination. The stamens and pistils form essential whorls because they are directly involved in reproduction.
Stamens:
They bear the anthers that contain pollen grains. Pistil The pistil is divided into a stigma, style and ovary. Ovary contains the female gametes called ovules.
Fertilization in a seed plant is achieved after the union of ___________________ | |||
| Right Option : C | |||
| View Explanation | |||
A plant develops into seeds in the fruit is called __________________ | |||
| Right Option : C | |||
| View Explanation | |||
Embryo sac is found in ___________________ | |||
| Right Option : B | |||
| View Explanation | |||
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