History
The ship Darwin sailed on for five years.
HMS Beagle
Evolution is a change in this makeup of a population.
Genetic makeup
Anatomy sharing a common ancestor, like tetrapod limbs.
Homologous structures
The species concept based on physical appearance.
Morphological
Isolation due to different mating signals
Behavioral isolation
Darwin's famous 1859 book.
On the Origin of Species
Traits are passed to offspring because they are this.
Heritable
Anatomy relics that are no longer functional.
Vestigial structures
Species concept requiring fertile, viable offspring.
Biological
Isolation due to different breeding schedules.
Temporal Isolation
Geologist who favored Uniformitarianism.
Charles Lyell
This occurs when more offspring are born than can survive.
Competition
A famous transitional fossil between birds and reptiles.
Archaeopteryx
Species concept using shared derived characters.
Phylogenetic
Isolation because reproductive parts do not fit.
Mechanical isolation
He wrote an essay on population and resources.
Thomas Malthus
Human breeding of animals to change populations.
Artificial selection
The sudden reappearance of an ancestral trait.
Atavism
Species concept useful for highly diverse bacteria.
Molecular
When an embryo is produced but cannot survive.
Hybrid inviability
He co-authored the 1858 paper with Darwin.
Alfred Wallace
These types of traits make survival more likely.
Advantageous traits
The "fish-amphibian" transitional fossil.
Tiktaalik
Groups the Biological Species Concept cannot define.
Fossils or asexual organisms
Offspring are healthy but cannot reproduce.
Hybrid sterility