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 this trait where he noticed that species had slightly different variations on different islands.
What are finches & their beaks?
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 change in DNA leads to genetic variation, the 2nd step of natural selection =
What is a mutation?
The first set of organisms that lived on Earth
What is Bacteria?
Place these organisms in order from which they evolved (first to last): bacteria, reptiles, mammals, amphibians, fish, trilobites.
What is bacteria, trilobites, fish, amphibians, reptiles, & mammals?
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?
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?
These kind of traits are more likely to get passed on in a population and increase an organism's chance of survival.
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?
In natural selection, the _______ "selects" whether or not traits of an organism will be successful.
What is the environment?
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?
Older rock layers & fossils are found in deeper layers and younger layers & fossils are on top
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?
An entire species has a better chance of survival and could survive a drastic environmental change if the population has this.
What is diversity/diverse population?
Any inherited trait that helps an organism, such as a plant or animal, survive and reproduce in its environment.
What is Adaptation?
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 how Geologic time periods are broken up over time
What are the appearance & disappearances of species?
3 pieces of evidence that scientists use for evolution
What are fossils, embryos, DNA, rock layers & comparative anatomy?
If a trait helps an organism survive and reproduce in a population, this will happen to the trait over time in that population.
What is it becomes common/increases in the majority of 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?
Organisms evolved in this direction over time, starting with single-celled organisms and ending with multi-cellular organisms.
What is more complex?