Fossil Clues
What does the fossil record provide evidence for?
Evolution and extinction over time
Body parts that have similar structure, but different function are called ____ structures.
Homologous
Who is known as the father of evolution?
Charles Darwin
What is an adaptation?
A trait that helps an organism survive in its environment.
Evolution is a change in a species over ____.
Time
Fossils show how organisms have ____ over time.
Changed or evolved
The wing of a bat and the arm of a human are examples of what type of structures?
Homologous Structures
What is natural selection often called because only the best-adapted survive?
Survival of the fittest
What might happen if a species cannot adapt to environmental changes?
Which fossil is older: one found in a lower rock layer or higher layer?
Lower rock layer
What type of rocks are most fossils found in?
Sedimentary Rocks
What do homologous structures suggest about species?
They share a common ancestor
What happens to traits that help an organism survive and reproduce?
They become more common in the population
Give an example of an animal that migrated to survival changes.
Birds
What is it called when a species completely dies out?
Extinction
True or False: All organisms that ever lived have left behind fossils.
False
Structures that have lost their original function, like human tailbones, are called ___.
Vestigial Structures
If a drought causes plants with small soft seeds to die, what kind of birds are most likely to survive?
Birds with larger, stronger beaks
What happens when an environment changes to quickly for species to adapt?
Mass extinction
Which process explains why giraffes have long necks?
Natural Selection
What is the study of fossils called?
Paleontology
Comparing embryos of different species show similarities that suggest what?
Common Ancestry
What four principles of natural selection lead to evolution?
Overproduction, Variation, Adaption, Selection
Name one human-caused environmental change that affects species survival.
Which three evidence support the theory of evolution?
Fossil Record, Comparative Anatomy, and Embryology