The correct option is (c).
Explanation
Flowers are the reproductive units of angiosperms. Based on the presence of male (androecium) and female (gynoecium) reproductive structures, flowers are classified as either unisexual or bisexual.
Statement 1 is Correct:
Unisexual flowers contain either only the stamens (male reproductive part) or only the pistil (female reproductive part). A male flower is staminate (bearing stamens only), while a female flower is pistillate (bearing pistils only).
Statement 2 is Incorrect:
Mustard and Rose are examples of bisexual flowers because they contain both stamens and pistils within the same flower. Examples of plants with unisexual flowers include papaya, cucumber, watermelon, and maize.
Statement 3 is Correct:
Plants producing unisexual flowers can be classified based on the location of the flowers:
- Monoecious plants: Both male and female unisexual flowers are present on the same plant (e.g., maize, cucumber, castor).
- Dioecious plants: Male and female flowers are present on different plants (e.g., papaya, date palm).
Key Takeaway:
Bisexual flowers (e.g., Hibiscus, Mustard) possess both essential whorls (androecium and gynoecium). Unisexual flowers lack one of the two. The distribution of these flowers determines if a plant is monoecious or dioecious.