i3 is what tooth number on the Modified Triadan System?
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This is a diagram of a(n)
This is a diagram of a(n)
Screen Shot 2020-05-04 at 3.40.35 PM.png The pictures above…
Screen Shot 2020-05-04 at 3.40.35 PM.png The pictures above all show the same fossil. What is the common name?
Which group is the direct ancestor of mammals?
Which group is the direct ancestor of mammals?
Which of the following animals is a predator?
Which of the following animals is a predator?
Which of the following is not a Vendian fossil?
Which of the following is not a Vendian fossil?
The super-predator of the Ordovician Seas was the _________.
The super-predator of the Ordovician Seas was the _________.
The Burgess Shale fossils support the evolutionary concept o…
The Burgess Shale fossils support the evolutionary concept of _________.
The Burgess Shale fossils are often referred to as a window…
The Burgess Shale fossils are often referred to as a window into _________.
The most maneuverable type of nautiloid in the Ordovician Se…
The most maneuverable type of nautiloid in the Ordovician Seas was the _________.