Question 1
The fossil record is incomplete because
◦ very few organisms were preserved as fossils.
◦ organisms tend to decay before becoming a fossil.
◦ animals with hard parts are preserved more easily.
◦ geological processes may destroy fossils.
◦ all of these
Question 2
The great apes and first hominids arose from a common ancestor approximately ____ years ago.
◦ 100,000
◦ 1 million
◦ 3 million
◦ 5 million
◦ 7 million