Question

From among the situations given below, choose the one that prevents both autogamy and geitonogamy.

• A. Monoecious plant bearing unisexual flowers.
• B. Dioecious plant bearing only male or female flowers.
• C. Monoecious plant with bisexual flowers.
• D. Dioecious plant with bisexual flowers.

Answer 1

The correct option is B Dioecious plant bearing only male or female flowers.

Autogamy can happen in case of bisexual flowers, where the androecium and gynoecium mature at the same time. Geitonogamy can happen in case of monoecious plants, like cucurbits bearing both male and female flowers on the same plant.

Dioecious plants bear either male or female flowers, hence cannot undergo self polllination of any type. Example, Carica papaya.

So, the correct answer is 'Dioecious plant bearing only male or female' flowers.