Identify the set comprising plants that produce bisexual flowers :
2023
Identify the set comprising plants that produce bisexual flowers :
- A.
Cucumber, Papaya, Rose
- B.
Mustard, Rose, Petunia
- C.
Corn, Cucumber, Petunia
- D.
Corn, Papaya, Mustard
Show answer & explanation
Correct answer: B
Concept: A flower is bisexual (hermaphrodite) when a single flower carries both the male whorl (androecium/stamens) and the female whorl (gynoecium/pistil) together. A flower with only one of the two whorls -- only stamens or only a pistil -- is unisexual (male or female); a plant bearing separate unisexual flowers on the same plant is monoecious, and one bearing them on separate plants is dioecious.
Application: Checking each named plant against this definition:
Plant | Flower type |
|---|---|
Cucumber | Unisexual (monoecious) |
Papaya | Unisexual (dioecious) |
Rose | Bisexual |
Mustard | Bisexual |
Petunia | Bisexual |
Corn (Maize) | Unisexual (monoecious) |
Only the set Mustard, Rose, Petunia has every member producing bisexual flowers; every other listed set contains at least one plant (Cucumber, Papaya, or Corn) that produces unisexual flowers, so those sets fail the criterion.
Cross-check: This matches the standard NCERT classification (Sexual Reproduction in Flowering Plants) -- mustard, rose (China rose), and petunia are the textbook examples of bisexual flowers, while cucumber, papaya, and corn/maize are the textbook examples of unisexual flowers -- and it also matches the CTET August 2023 Paper II official answer key.
Answer: Mustard, Rose, Petunia.