|What are the 4 stages of evolution?
|1.overproduction 2.genetic variation 3.struggle to survive and 4. successful reproduction
|What is overproduction?
|It is when more offspring are produced then will survive to adulthood.
|What is genetic variation?
|It is when all organisms within a population are slightly different from one another.
|What is a struggle to survive?
|It is when organisms compete and the ones with favorable traits survive and reproduce.
|What is successful reproduction?
|It is when organisms that survive will reproduce.
|What is mutation?
|It is a change in the sequence of DNA that cause variations within a species.
|What is insecticide resistance?
|It is when farmers use insecticide- the insects resist and reproduce.
|What is adaptation to pollution?
|It is when organisms change and adapt to pollution in the environment.
|What is speciation?
|It is when two populations become so different that they can no longer interbreed.
|What is separation?
|It is when the portion of the population becomes isolated (earthquake, Pangea, canyons, etc.)
|What is adaptation?
|As the environment changes, so does the population (natural selection is occurring)
|What is division?
|Over millions of generations, 2 groups are now so different that they are no longer the same species.
|What is "Survival of the Fittest"?
|Only organisms with favorable traits will survive and reproduce.
|What is extinction?
|When a species dies out completely because they don't have the resources or adaptations to survive.
|What is evolution?
|The process by which organisms accumulate inherited changes over time.
|What do scientists believe?
|We all share a common ancestor (bacteria)
|Who was Charles Darwin?
|He determined how evolution occurred by studying finches in the Galapagos Islands.
|What are adaptations?
|The characteristics that allow or help an organism to survive and reproduce.
|What are examples of adaptations?
|frog coloring, beak shape, ear size
|What do adaptations allow some organisms to do?
|Some organisms can survive and reproduce at a greater rate than other organisms.
|What are fossils?
|They are solidified (hardened) remains or imprints of once living organisms. Scientists use layers of sediment to determine relative age.
|What are vestigial structures?
|They are the remnants of once useful structures
|What shows similarities among organisms?
|What are skeletal structures?
|They are same bone structures. EX: dolphin flipper, bat wing, human arm and a cat leg.
|What is DNA?
|All organisms have it. Many have it with similar codes.
|What are embryonic structures?
|Structures before they are born. EX: chicken, rabbit, human