Am amniotic egg is first developed in the reptiles.
The membrane and shell make a protective membrane that can provide a safe environment for the cells to divide, and embryo to develop. Animals having an amniotic shell are called as amniotes. The other body parts develop later on.
1. They play dead when faced by a predator.
2. They travel in schools of about 12.
3. Males establish their dominance by having sword fights with their spines and showing off their bright colors.
C. They are able to be divided by a chemical reaction.
Crust
mantle
convection currents
outer core
inner core
A toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
