Given below are two statements:
Statement I: In axile placentation, the ovules develop on the inner wall of the ovary or on peripheral part.
Statement II: Ovary is one-chambered but it becomes two-chambered due to the formation of the false septum in mustard and Argemone.
In the light of above statements, choose the correct answer from the options given below:
Statement I is incorrect but Statement II is correct.
— Concept: This question tests your understanding of different types of placentation in flowering plants and specific…Concept: This question tests your understanding of different types of placentation in flowering plants and specific examples of ovary structure.
Why (B) is correct:
Statement I is incorrect because in axile placentation, the ovules develop on a central axis or column in a multicarpellary, syncarpous ovary. The ovary is partitioned into chambers (locules). The description given in Statement I (ovules developing on the inner wall or peripheral part) corresponds to parietal placentation.
Statement II is correct. In plants like mustard (Brassica) and Argemone, the ovary is initially one-chambered (unilocular) but becomes two-chambered (bilocular) due to the formation of a false septum, also known as a replum. This is a characteristic feature of parietal placentation in these families.
Why other options are wrong:
A) Statement I is incorrect, so this option is wrong.
C) Statement I is incorrect, so this option is wrong.
D) Statement I is incorrect, but Statement II is correct, so this option is wrong.
Common Mistake: Students often confuse the definitions and examples of different placentation types, especially axile and parietal.
NEET Tip / Mnemonic: Remember 'MAP' for Mustard and Argemone having Parietal placentation with a false septum.
Correct Answer: (B)
Statement I is incorrect but Statement II is correct.