Question

Ovule of Opuntia is

• A. Campylotropus
• B. Amphitropous
• C. Circinotropous
• D. Hemitropous

Answer 1

The correct option is C Circinotropous

•Campylotropous ovule- This type of ovule is similar to Anatropous ovule but curvature is less than that of anatropous ovule. Micropyle is near to the funiculus. Chalaza and micropyle lie in the straight line but hilum is at 90° to micropyle. Campylotropous ovule is found in family Chenopodiaceae and in Pisum and Capsella.

•Amphitropous ovule- The body of ovule gets curved along with the embryo sac in such a way that it becomes horseshoe-shaped. This type of ovule is found in families like Butamaceae, Loganiaceae.

•Circinotropous ovule- In this type of ovule, the length of funiculus becomes increased and it covers the whole ovule. It is found in families like Cactaceae (Opuntia).

•Hemianatropous ovule- The body of ovule is turned through 90° and micropyle and chalaza lie in a straight line but funiculus is at right angle or 90° with both these two. E.g. Ranunculaceae.

Since Opuntia has Circinotropous ovule.

So, the correct answer is C.