Which of the following statements about the Cambrian time period is FALSE?
Early Cambrian animals were brachiopods and trilobites.
Nearly all the modern phyla of animals first appeared in the Cambrian, including vertebrates.
Ammonoids and nautiloids became abundant at the end of the Cambrian.
The Burgess Shale contains numerous well-preserved Middle Cambrian fossils.
Life first colonized the land during the Cambrian.