Question

Replum is a
A. False placenta
B. False septum
C. False ovule
D. False thalamus

Answer 1

Hint: Flowers have various parts which perform a particular function whether it is providing nutrition, giving support or some kind of help in the reproduction. There are false parts also which look like something but do not do the exact work, that is why they are called false parts. They form the pseudo part of that particular organ of the plant.

Complete answer:
> Option A: False placenta:
Placenta is found in baby carrying mammals, the fetus is attached to the mother’s body via a placenta. Same way, in flowering plants, the ovules are attached to the ovary by the placenta. It is submarginal in position. This will help the embryo to get nourished.

> Option B: False septum:
Septum is the thin membrane that will separate the two chambers like a wall. So a false septum will look a bit differently, it will look like septum but inside the carpel will only border the micropyles of the ovules. It is also called replum. It is present in mustard. Replum makes the ovary bilocular.

> Option C: False ovule:
Ovules are the eggs of the female gametophytes. It develops into a seed of the fruit. There is only one ovule in an ovary. There is no term like false ovule.

> Option D: False thalamus:
Thalamus is the thicker part of the base of the stem which will be the site of flower origin. It is a modified stem. It supplies nutrients to the flowers. There is nothing like false thalamus.

Hence, The correct answer is option (B).

Note: Replum develops between the two parietal placentae to make the ovary bilocular. It happens in the Brassicaceae family. Bilocular means having two cells/chambers. Bicarpellary ovary when growing a septum in between carpels, it is called bilocular.