24. History of Life on Earth

What does the fossil record primarily document?

Which of the following can be learned about a species from studying their fossilized skeletons?

Why is the fossil record of clams more complete than that of spiders?

Which of the following organisms would be most likely to form a fossil?

Which of the following best describes the type of information that fossils provide about the history of organisms on Earth?

Which question could best be answered by studying fossils?

If a fossil is determined to be 65 million years old, during which geological period did the organism most likely live?

What trend in the complexity of life over time is observed through the fossil record?

The oldest fossils usually __________.

Which type of fossil forms when minerals in water fill the spaces within an organism's remains, hardening into rock and preserving its shape?

Which of the following is an example of a biomarker found in the fossil record?

According to the fossil record, the first land plants were most likely:

Approximately how long ago do we find the first fossils of multi-celled organisms?

Which of the following patterns do scientists commonly identify in the fossil record?