Structure I
Structure II
Genetic Evidence
Embryology & Genetics?
Fossil Record & Geologic Time Scale
Cladograms
100
What are homologous structures?
Body parts of organisms that are similar in structure and position, but different in function.
100
What is a vestigial structure?
Body parts that have lost their original function through evolution.
100
What is the building block of DNA called?
Nucleotide
100
What is a phenotype?
The physical characteristics (or proteins) determined by your genes
100
Naturally preserved remains, imprints or traces of organisms that lived long ago are called what?
fossils
100
A common ancestor is represented by a _____.
node
200
What is an Analogous structure?
Body parts of organisms that perform a similar function but differ in structure.
200
How are vestigial structures evidence of descent from ancestral species?
A structure with no function in a living species suggests that it descended from an ancestor that used the structure.
200
In DNA, the base adenine pairs with the base ___________.
thymine
200
What is an embryo?
An unborn or unhatched offspring in the process of development.
200
The fossil record is enormous, but is still_________.
incomplete
200
The different traits that distinguish between different clades are called:
derived characteristics
300
The wings of a butterfly and the wings of an eagle are an example of:
Analogous Structures
300
The following picture is an example of what type of structure?
What purpose did our appendix use to serve?
Analagous structures
300
According to the table below, which two organisms are most closely related?
F and G
300
What is the complementary DNA strand for the following sequence: CGGTA
GCCAT
300
Generally, the older the fossil, the shallower or deeper it is in Earth
deeper
300
How many derived characteristics are in this cladogram?
6
400
The leg of a cat and the wing of a bird are an example of:
Homologous Structures
400
What are examples of vestigial structures in humans?
Appendix, tailbone, wisdom teeth, body hair, etc
400
What are the three parts of a nucleotide?
Sugar (deoxyribose), base, and phosphate group
400
The _______ or ordering of base pairs determines the ________ or the physical appearance.
Genotype, phenotype
400
What provides evidence that species have changed over time?
Fossil Record
400
Is the frog more closely related to the tuna or the human?
The tuna. It only has one characteristic between them. The human has two.
500
Do homologous or analogous structures give us more evidence about two species sharing a common ancestor?
homologous
500
The following picture represents what type of structures? 
Vestigial Structures
500
How is genetic evidence used to determine relationships among species?
By comparing shared genes or proteins in different species to see how closely they match. The closer the match, the more likely they're related.
500
How can embryos be used as evidence of a common ancestor between organisms?
Evidence of common anatomy in embryos suggests that they inherited the genes for that anatomy from a common ancestor
500
What happened in between each of the major eras?
Mass extinctions
500
What organism is most closely related to the jellyfish?
Scorpion