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6. what is the first chamber occupied by the juvenile in an ammonoid called?
- body chamber
- protoconch
- aperture
7. true or false, ammonoids evolved to become more complex in their suture lines
8. what is the term for the suture lines are simple?
- heteromorphic
- orthoceratitic
- ceratitic
- goniatitic
9. which order were the ammonoids oldest - youngest
- goniatites, ceratites, ammonites
- ceratites, ammonites, goniatites
- goniatites, ammonites, cerratites
- ammonites, ceratites, goniatites
10. what is the phylum of nautiloids and ammonoids
- echinodermata
- mollusca
- cnidaria
- cephlapoda
11. when did ammonoids become extinct?
- cretaceous
- cambrian
- jurrasic
- triassic
12. was the siphuncle of an ammonoid in the centre of the body or towards the venter?
- towards the venter
- in the center
13. were the septal necks of a nautiloid facing away or towards the aperture?