Fossils
What are Fossils?
Preserved remains or traces of ancient organisms
What are homologous structures?
Structures with similar bone patterns but different functions.
What is an Embryo?
Early stage of development before birth
What is DNA?
Genetic Material that carries traits
What is Evolution?
Changes in species over time
What type of rock are fossils found in?
Sedimentary Rock
What do homologous structures suggest about species?
Common ancestry
What is embryology?
Study of Embryo's
Species are closely related
What is an adaption?
Trait that helps survival
What does the fossil record show?
it shows how life has changed over time
How are a human arm and bat wing similar?
Same basic bone structure used differently
Why do scientists compare embryos of different species?
To compare development and look for similarities.
What are analogous structures?
Structures that have similar functions but different origins
What is natural selection?
Process where better-adapted organisms survive and reproduce
How do rock layers help scientists study fossils?
Older fossils are deeper, newer fossils are higher up
What are vestigial structures?
Structures that no longer have a fuction
What do similar early embryos suggest?
Shared patterns in early development
What is the difference between homologous and analogous structures?
homologous = same structures origin analogous = same function only
Why do helpful traits become more common over time?
They survive longer and reproduce more
What is an transitional fossil?
A fossil showing a form between two species
Give an example of a vestigial structure
Human tailbone or appendix
How does embryology support Evolution?
Shows species may share a common ancestor
Why is DNA strong evidence for evolutoion?
DNA shows genetic relationships and common ancestry
how does antibiotic resistance show evolution?
Resistant Bacteria survive antibiotics and pass on resistance