6. when did the trilobites first make an appearance in the fossil record
495 mya
521 - 250 mya
200 mya
250 - 525 mya
7. Only a small amount of animals that's been tested has homeobox sequences in its DNA
False
True
8. What is the class for nautilus
Animalia
Athropoda
Cephalopoda
Mollusca
9. What is the class for trilobites
Cephalopoda
Trilobita
Arthropoda
Mollusca
10. what is the kingdom for trilobites
Animalia
Mollusca
Arthropoda
11. How long could orthoceras grow to
over 14 feet
10 feet
over 15 feet
12 feet
12. What time period have nautilus been around from
Ordovician period
Lower devonian period
Cambrian period
13. What time periods did orthoceras live from
Early ordovician - Triassic period
Cambrian - Lower devonian period
14. are hox genes evolutionary conserved
Yes
No
15. how many body plans survived to become modern animals
35
37
42
47
16. Nautilus are highly diverse
True
False
17. what are hox genes (homeobox)
group of related genes that control the body plan of an embryo along the head-tail axis. They are the blueprint for the animal body plan of an embryo.
group of related genes that control the body plan of an embryo along the dorsal - ventral axis. They are the blueprint for the animal body plan of an embryo.
