Amniotic Egg

Question 1

What do amniotes produce?

Answer 1

• eggs that, after fertilisation, develop extra-embryonic membranes
• these are fluid-filled membranes that allow the embryo to survive and develop on land (or in the case of mammals, internally in the uterus)

Question 2

What are the characteristics of amniotic eggs?

Answer 2

• fertilisation is internal
• the membranes develop after fertilisation

Question 3

How does the amniotic egg maximise reproductive success?

Answer 3

• the embryonic membranes of an amniotic egg maximise the development of the embryo and foetus before hatching or birth
• this will enable the offspring to survive the harsh conditions on land more easily and successfully