Question

In which of the following plants, are flowers unisexual?

• A. Papaya
• B. Hibiscus
• C. Brassica
• D. Pisum sativum

Hint:

Unisexual flowers have either male or female reproductive organs, while bisexual flowers contain both male and female parts.

Answer 1

The Correct Option is A

In plants, unisexual flowers are those that contain either male or female reproductive organs, but not both. These flowers are either staminate (male) or pistillate (female).
Step 1: Papaya.
Papaya plants have unisexual flowers. Male and female flowers are present on separate plants, meaning papayas are dioecious, with male and female flowers appearing on different individuals.
Step 2: Hibiscus.
Hibiscus plants have bisexual flowers, meaning each flower contains both male and female reproductive organs. Hence, hibiscus flowers are not unisexual.
Step 3: Brassica.
Brassica (e.g., mustard) has bisexual flowers, with both male and female reproductive organs in the same flower. Therefore, these flowers are not unisexual.
Step 4: Pisum sativum.
Pisum sativum (pea plant) also has bisexual flowers, where both male and female parts are present in the same flower. Thus, pea flowers are not unisexual.
Step 5: Conclusion.
Therefore, the correct answer is (A) Papaya, which has unisexual flowers.