Question

These are placentation types based on the attachment of ovules within the ovary:

• Ridge
• Inner wall of the ovary
• Base of the ovary

• A. Marginal, Parietal, Basal
• B. Axile, Parietal, Free central
• C. Basal, Axile, Marginal
• D. Marginal, Axile, Basal

Hint:

Remember the sequence by associating each type with its respective position in the ovary: ridge, wall, and base.

Answer 1

The Correct Option is A

To solve the problem, we need to identify the correct placentation types based on the attachment of ovules in the ovary.

1. Understanding the Placentation Types:
Placentation refers to the arrangement of ovules within the ovary. Common types of placentation include:
Marginal: Ovules are attached along the margin of the ovary.
Parietal: Ovules are attached to the inner wall or the base of the ovary.
Basal: Ovules are attached at the base of the ovary.
Axile: Ovules are attached to a central column inside the ovary.
Free central: Ovules are attached to a central column but without a partition.

2. Analyzing the Options:
(A) Marginal, Parietal, Basal: These are correct types of placentation, where the ovules are attached along the margin, to the wall, and at the base of the ovary respectively.
(2) Axile, Parietal, Free central: These terms are correct in describing types of placentation, but they refer to different characteristics of the ovule attachment.
(3) Basal, Axile, Marginal: These are also correct types of placentation, but the order is different from the correct arrangement.
(4) Marginal, Axile, Basal: This set also describes correct types of placentation, but the order does not match the standard terminology.

3. Identifying the Correct Answer:
The correct order of placentation types, as listed in the question, is Option (A), which is Marginal, Parietal, and Basal.

Final Answer:
The correct answer is Option A: Marginal, Parietal, Basal.

Answer 2

The correct sequence is Marginal, Parietal, Basal.
Marginal placentation occurs on the ridge of the ovary.
Parietal placentation occurs along the inner wall of the ovary.
Basal placentation occurs at the base of the ovary.