Exam 11: Evidence of Evolution

Darwin was inspired by ____ ideas on the geologic history of Earth, which allowed him to better understand the geology of the regions he would visit on his journey aboard the Beagle .

After the publication of On the Origin of Species , the idea of evolution was generally accepted. What part of Darwin's theory of evolution, however, was fiercely debated?

The time it takes for half of the atoms in a radioisotope sample to decay is called the ____.

In his voyage around the world in the Beagle , what observation did Darwin make about animals?

Which genes guide the formation of specific body parts during embryonic development?

Lyell's ideas that gradual, everyday geologic processes had shaped Earth challenged the prevailing estimate of Earth's age at ____, because ____.

Which factor influences radioactive decay?

Zircon crystals that form in molten magma are easily dated because they initially contain ____.

A mass extinction, in which the dinosaurs disappeared from Earth, occurred approximately ____ years ago.

When a certain form of a trait increases the fitness of the individual, this allele will tend to ____ over time.

Fossilization most often occurs through the geologic process(es)of ____.

Fossils older than ____ cannot be dated by their ¹⁴C content because ____.

Which types of fossils are we most likely to find?

____ is the study of body plans and structures.

How are fossils older than 60,000 years dated?

Scientists have determined that this crater was created by a(n)____.  

The Kaibab limestone layer of sedimentary rock is the closest to Earth's surface; therefore ____.