| Male Frog | Female Frog |
|---|---|
| $(1)$ It has two vocal sacs. | $(1)$ It has no vocal sacs. |
| $(2)$ It has a copulatory pad on the first digit of the forelimb. | $(2)$ It is absent in females. |
| $(3)$ It obtains a dark yellow colour of skin during the reproductive period. | $(3)$ No change in skin colour is observed. |
| $(4)$ Its abdominal region is narrow and flat. | $(4)$ During the reproductive period,the abdomen becomes broad and swollen. |
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