Vocabulary
Gradual change in a species over time
Darwin visited these islands off the coast of Ecuador in South America.
Galapagos Islands
This is term the driving force of evolution. Nature decides who lives and who dies based on traits best suited to the environment.
Natural Selection
This trait of natural selection is the __________ of resources. We fight with others for food, shelter, and mates.
Competition
The more base pairs that two species share, the (more or less) related they are.
More!
Structures that are the same in multiple species which shows they are related. (Think bat wing and human arm)
Homologous Structures
Darwin's main focus of investigation as this animal
Finches
Adaptation that allows animals to blend into their environment
Camouflage
To work, natural selection requires __________ (different types of organisms) and genetic _________ (different types of traits) to work.
Diversity and Variation
Two animals with the same forelimb structure are said to have __________ structures.
Homologous
Movement of genes in and out of populations
Gene flow
He traveled to the Galapagos Islands on this ship at the age of 22 years old.
HMS Beagle
Animal/plant acting like another for protection or to sneak up on prey
Mimicry
This defines how some organisms with favorable characteristics survive and reproduce while other organisms without favorable characteristics die off is called:
Survival of the fittest
This type of evidence studies similarities between a living species and old remains preserved by the Earth
Fossils
An organism's ability to survive & reproduce
Fitness
He developed this concept after noticing that change favors traits that allow species to thrive. Hint: Darwin's Theory of Evolution by _________ _________.
Natural Selection
This trait of evolutionary theory states that "every species must have descended by reproduction from pre-existing species, and that species must change over time"
Descent with modification
Creation of a new species evolving from a common ancestor over time
Speciation
Humans and birds have gills and tails in their early embryonic stages. We (and birds) no longer have a use for gills (or tails), thus they go away as we develop. These similarities allow us to see how we are related and maybe if we share a common ancestor. This term to show similarities between embryos is called:
Embryology
How varied the species are in an environment
Biodiversity
How long did it take Darwin to formulate and publish his findings after visiting the Galapagos Islands?
20 years! (That's a lot of time to think!)
Process of natural selection. The better the traits you have, the better your chances of survival.
Survival of the fittest
Fish, lizards, turtle, and some mammals produce more young than will survive. This is called _____________.
Overproduction of a population
These structures are organs or traits that are no longer needed.
Vestigial Structure