Question

Which of the following is an analogous organ of thorn?

• A. Tendril
• B. Spine
• C. Flower
• D. Leaf

Answer 1

The correct option is B

Spine

The correct option is B.

Explanation of the correct option:

1. The organs or structures that are functionally similar but vary in structure and origin are called analogous organs or structures.
2. For example, thorns and spines both have pointed ends to harm the predator, but thorns are modifications of axillary buds, and spines are modified leaves.
3. Thus, thorns and spines are analogous organs.

Explanation of the incorrect options:

Option A:

Tendrils have a different function than thorns. They help in providing support to the crawling plants.

Option C:

Flowers have reproductive structures, thus, helping in fertilization to form seeds.

Option D:

Leaf perform the function of photosynthesis.

Final answer: A thorn is analogous to a spine.