Life Sciences Term 1

Ovipary

• Refers to egg laying animals
  
• Eggs are protected by a hard shell, while others are protected by a jelly like layer after fertilisation
  
• Development does not occur inside the body
  
• The development of an organism is completed inside the egg after it has been laid
  
• Examples: frogs, insects, birds, and marine animals
  

Ovovivipary

• Animals that do not lay eggs but keep them in their bodies until they hatch
  
• The body temperature is necessary for them to hatch
  
• There is no connection between the embryo and the mother
  
• Examples: sharks, lizards, cockroaches and some snakes
  

Vivipary

• Refers to animals that give birth to live young ones
  
• There is a connection between the developing foetus and the mother
  
• Examples: most mammals like human beings, whales and kangaroos