Question | Answer |
---|---|
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 in organisms. |
What shows similarities among organisms? | comparing 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 |