Question

Absent in female frogs are:

• A. Trunk
• B. Copulatory pad
• C. Webbed feet
• D. Tympanum

Hint:

A quick way to identify male frogs is the presence of vocal sacs and copulatory (nuptial) pads during the breeding season.

Answer 1

The Correct Option is B

Concept: Male and female frogs exhibit certain sexual differences. During the breeding season, males develop specialized structures that assist in mating. One such structure is the copulatory pad or nuptial pad.

Step 1: Examine Option (A)
Both male and female frogs possess a trunk region. Hence, this cannot be absent in females.

Step 2: Examine Option (B)
Copulatory pads are specialized rough pads present on the forelimbs of male frogs. These structures help males firmly grasp females during amplexus. Female frogs do not possess copulatory pads. Therefore, Option (B) is correct.

Step 3: Examine Option (C)
Webbed feet are present in both sexes and assist in swimming. Hence, this option is incorrect.

Step 4: Examine Option (D)
The tympanum is present in both male and female frogs although its size may differ. Hence, this option is incorrect. \[ \boxed{\text{(B) Copulatory pad}} \]