Question

Collophore in Collembolan is present on the abdominal segment:

• A. I
• B. II
• C. III
• D. IV

Hint:

Remember Collembolan abdominal structures:
- Segment 1: Collophore (ventral tube for water uptake).
- Segment 3: Tenaculum (locking catch).
- Segment 4: Furcula/Furca (forked jumping spring).

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Collembolans (springtails) are primitive, wingless entognathous hexapods that possess specialized abdominal structures adapted for moisture regulation, adhesion, and locomotion.

Step 2: Detailed Explanation:
The collophore (also known as the ventral tube) is a prominent, cylindrical, bilateral appendage located on the ventral side of the first abdominal segment (I) of Collembola.
It serves vital physiological functions, including:
- Osmoregulation and moisture absorption from the environment.
- Serving as an adhesive organ to help the insect anchor to slippery smooth surfaces.

Step 3: Final Answer:
The collophore is present on the first abdominal segment, which corresponds to option (A).