Question

Most common ovule partially inverted and curved, such that the micropyle nearly meets the funiculus, is called as
a. Anatropous
b. Campylotropous
c. Circinotropous
d. Amphitropous

Answer 1

Hint: ovule in plants contain components called nucellus and integuments. Based on the arrangement & shape, mainly ovules, are classified into six types.

Complete answer:
Types of ovules in plants
- Orthotropous or atropous: In this type, the ovule is straight, where chalaza( tissue where nucleus and integument meet), funicle, micropyle are all in straight alignment.

- Anatropous: In this type ovule is entirely inverted, where micropyle lies close to hilum( hilum is where the seed is attached to the fruit by funicle).

- Hemi- anatropous: In this type, the ovule is transversely placed. So it looks like the ovule is lying on its side. Chalaza and micropyle are in a straight line.

- Campylotropous: In this type the ovule is bent (partially curved) chalaza and micropyle are not in a straight line or lost.

- Amphitropous: In this type, both ovule and embryo sac are very much curved, so ovule itself appears as a horseshoe shape.

- Circinotropous: Initially, it is straight, but due to rapid growth later, it becomes Anatropous. Which means funicle here creates the full circle.

So from the above explanation, campylotropous becomes the correct option as it is partially curved.

Note: By knowing the meaning of ovules like where tropous mean turn
Ortho- straight
Ana- back (inverted)
Campylo- curved
By knowing the meaning it will be easy to answer the question in an eliminating manner.