Dating
A type of relative dating that examines the layers of sedimentary rocks.
What is stratigraphy?
These are similar underlying structures from a common ancestor.
What are homologous structures?
These are the ancient remains of once living things.
What are fossils?
These are differences in traits.
What is variation?
The Earth is approximately this old.
What is 4.6 billion years?
For carbon-14 dating, this is about 5760 years.
What is a half-life?
These are reduced or non-functional structures that provide good evidence for evolution.
What are vestigial structures?
DNA and protein analysis are examples of this type of evidence.
What is molecular evidence?
Differential survival and reproduction is sometimes
known as "survival of this".
The largest geologic time units are these such as Proterozoic and Phanerozoic.
What are eons?
Absolute dating differs from relative dating in that it gives us this.
What is an exact age?
Human arm bones, bat wings, and whale flippers are examples of these.
What are homologous structures?
Gill slits and tails in human and other vertebrates before birth represent this type of evidence.
What is embryology?
Another name for inheritance is this.
What is heredity?
Of eras, epochs, eons, and periods, the smallest time unit is the.
What is epoch?
Dendrochronology is another name for this type of absolute dating.
What is tree ring dating?
Whale feet bones and the human appendix are examples of these.
What are vestigial structures?
The different types of dogs and cattle developed by humans are examples of this.
What is artificial selection?
Over time by this process, favorable traits become more common in the population in certain environments, changing the species.
What is adaptation?
These are the three eras of the Phanerozoic eon.
What is the Paleozoic era, Mesozoic Era, and Cenozoic Era?
Faunal succession uses these types of fossils.
What are index fossils?
These are independently evolved traits in distantly related organisms due to adaptation to similar environments such as bird wings, bat wings, butterfly wings.
What are analogous structures?
This the distribution of living things over the Earth.
What is biogeography?
This is a process where organisms with advantageous traits for their environment survive and reproduce more, passing those traits on to their offspring.
What is natural selection?
The Hadean Eon, Archaean Eon, and Proterozoic Eon make up this.
What is the Precambrian.