MHT CET 202621 AprilMorning Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 21 April
- Shift
- Morning Shift
- Subject
- Biology
- Chapter
- Plant - Growth and Development
MHT CET 2026 · 21 April · Morning Shift · Biology · Plant - Growth and Development
The natural auxin produced by the placental tissue of the...
The natural auxin produced by the placental tissue of the unfertilized ovary and responsible for enlargement of ovary into fruit is ---------------.
Options
- ANAA
- B2,4-D
- CIAA
- DIBA
Correct answer
C. IAA
Step-by-step solution
Auxins are a class of plant hormones that play a crucial role in various aspects of plant growth and development.
Indole-3-acetic acid (IAA) is the principal natural auxin found in plants. It is produced by the placental tissue of the unfertilized ovary and is responsible for the enlargement of the ovary into a fruit, a process known as parthenocarpy.
NAA (1-Naphthaleneacetic acid) and 2,4-D (2,4-Dichlorophenoxyacetic acid) are synthetic auxins, while IBA (Indole-3-butyric acid) is another natural auxin but IAA is the primary one involved in this specific process.
Answer: IAA
Indole-3-acetic acid (IAA) is the principal natural auxin found in plants. It is produced by the placental tissue of the unfertilized ovary and is responsible for the enlargement of the ovary into a fruit, a process known as parthenocarpy.
NAA (1-Naphthaleneacetic acid) and 2,4-D (2,4-Dichlorophenoxyacetic acid) are synthetic auxins, while IBA (Indole-3-butyric acid) is another natural auxin but IAA is the primary one involved in this specific process.
Answer: IAA