Reproduction and Development in Frog MCQ - Practice Questions with Answers

• Frogs have well-organised male and female reproductive systems.

Male Reproductive System

• Male reproductive organs consist of a pair of yellowish ovoid testes which are found adhered to the upper part of kidneys by a double fold of peritoneum called mesorchium.
• Vasa efferentia are 10-12 in number that arises from testes. 
• They enter the kidneys on their side and open into Bidder’s canal. 
• Bidder's canal is present inside the kidney of the frog. It receives sperms from testes via a number of vasa efferentia.
• Vasa efferentia communicates with the urinogenital duct that comes out of the kidneys and opens into the cloaca. 
• The cloaca is a small, median chamber that is used to pass faecal matter, urine and sperms to the exterior.
  

Female Reproductive System

• The female reproductive organs include a pair of ovaries.
• The ovaries are situated near kidneys and there is no functional connection with kidneys
• A pair of oviduct arising from the ovaries opens into the cloaca separately. 
• A mature female can lay 2500 to 3000 ova at a time. 
• Fertilisation is external and takes place in water. Development involves a larval stage called tadpole. 
• Tadpole undergoes metamorphosis to form the adult.