Evolution
If a species cannot adapt or it does not have the appropriate traits for an environment, this will eventually occur
What is extinction?
Darwin studied these organisms and noticed that species had slightly different variations on different islands.
What are finches & giant tortoises?
This is type of beak would be more successful during a long period of little to no rain, which leaves nuts and seeds as a food source.
What is a strong, large beak?
This term means change through time. The theory that existing life forms have evolved from earlier forms over long periods of time.
What is evolution?
Human, snake, bat, chicken, & salmon embryos have many similarities in the early stages of development, which means they all share ___________.
What is a common ancestor?
Individuals that are better equipped to live in an environment will survive & reproduce passing on favorable traits to offspring. (Step)
What is Selection & Successful Reproduction?
Any inherited trait that helps an organism, such as a plant or animal, survive and reproduce in its environment.
What is Adaptation?
Organisms with differences within a species have a better chance of evolving should a change arise
What is Genetic Variation?
Place these organisms in order from which they evolved (first to last): reptiles, mammals, amphibians, fish.
What is fish, amphibians, reptiles, & mammals?
Individuals in a species with different traits compete with each other for limited resources & try to survive. (Step)
What is Competition & Struggle to Survive?
This is how you can tell that organisms are more closely related on an evolutionary tree.
What is they are closer together on the diagram?
A process in which organisms that have certain beneficial traits will survive better than others over time- survival of the fittest determines who will "win" in the game of life.
What is Natural Selection?
This determines whether 2 animals are apart of the same species
What is their ability to produce fertile offspring?
This explains how 1 species of finches turned into 13 over millions of years on the Galapagos
What are different food sources on various islands?
These are the 4 steps that Darwin says makes up Natural Selection
What is Overproduction, Genetic Variation, Competition/Struggle to Survive, and Successful Reproduction?
Most recently, this has been the cause of the high rate of extinction among many species in the last 500 years
What are humans/human activity?
Older rock layers & fossils are found in deeper layers and younger layers & fossils are on top
In natural selection, the _______ "selects" whether or not traits of an organism will be successful.
What is the environment?
3 pieces of evidence that scientists use for evolution
What are fossils, embryos, DNA, & comparative anatomy?
If a trait is helpful, organisms have a greater chance of survival and to reproduce. Passing that trait on to offspring over many generations will eventually lead to this in the population.
What is it becomes common in the population?
If a sick person takes an antibiotic but it doesn't kill all of the bacteria causing the sickness, what might explain this?
Variations in the bacteria resistance (High, average, low) allowed some organisms to be less affected by the antibiotic
Any fossil or series of fossils that give(s) information about how an organism has evolved over time
What is a transition fossil?
This determines how Geologic time periods are broken up over time
What are the appearance & disappearances of species?