Natural selection
Sexual selection
Genetic drift
Gene flow
Temporal isolation
Behavioral isolation
Geographic isolation
Mutagenic isolation
Radiometric dating
Relative dating
Speed dating
Geologic time scaling
Disruptive
Directional
Stabilizing
Normal
Bipedalism frees the hands to use tools
Bipedalism frees the hands to carry food
Bipedalism frees the hands to carry young
Bipedalism frees the hands to walk faster
Cast of a brain
Mold of a foot
Fossilized "droppings"
A dead tree
Heritability
DNA mutation
Random mating
Symbiosis
The environment
A breeder
Mutation
A virus
Hybridization
Mutation
Natural selection
Sexual selection
Mutation
Gene flow
Gene pool
Allele
Artificial selection
Natural selection
Descent with modification
Overproduction
Gene pool
Allele frequency
Mutation rate
Phenotype
Very similar DNA sequences
Exactly the same DNA sequences
No proteins in common
Completely different DNA sequences
Australopithecus aferensis
Australopithecus africanus
Homo erectus
Homo neanderthalensis
Australopithecus aferensis
Australopithecus africanus
Homo erectus
Homo neanderthalensis
2000 years
6 million years
6000 years
200,000 years
2 million years
2 thousand years
6 million years
6 thousand years
Amoeba proteus
Paramecium caudatum
Euglena gracilis
Panthera leo
Archaea
Bacteria
Mammalia
Eukarya
Amoeba proteus
Paramecium caudatum
Euglena gracilis
Panthera leo
Panthera
Tigris
Both words
Neither word
Protista
Archae
Bacteria
Domain
Species
Genus
Phylum
Family
Amoeba proteus
Paramecium caudatum
Euglena gracilis
Panthera leo
It helps prevent water loss.
It helps protect the plant from infection.
It helps the plant grow taller.
It helps the plant reproduce.
Wait!
Here's an interesting quiz for you.