Biology · STRUCTURAL ORGANISATION IN ANIMALS

Identify the correct statements regarding the excretory and reproductive systems of frog: (A) A mature female frog can lay 2500 to 3000 ova at a time. (B) The urinary bladder is thin-walled and present ventral to the rectum. (C) Kidneys are composed of structural and functional units called uriniferous tubules or nephrons. (D) Development involves a free-swimming larval stage called tadpole that undergoes metamorphosis. Choose the correct answer from the options given below:

1. A
   (A) and (D) only
2. B
   (A), (B), (C) and (D)
3. C
   (A), (B) and (C) only
4. D
   (B) and (C) only