Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
7th Grade Evolution
Evolution Questions & Definitions
| Question | Answer |
|---|---|
| adaptation | a characteristic that helps an organism survive and reproduce in its environment |
| species | a group of organisms that can mate with one another to produce fertile offspring |
| evolution | the process by which populations accumulate inherited changes over time |
| fossil | solidified remains or imprints of a once-living organism |
| fossil record | fossils that provide a historical sequence of life |
| vestigial structure | the remnant of a once-useful anatomical structure |
| trait | a quality that can be passed on from 1 generation to another |
| selective breeding | breeding of organisms that have a certain desired trait |
| natural selection | process by which organisms with favorable traits survive and reproduce at a higher rate thatn organisms without the favorable traits |
| generation time | period between the birth of 1 generation and the birth of the next generation |
| extinct | a species of organism that has died out completely |
| What are the 4 geological time eras? | Precambrian Time, Paleozoic Era, Mesozoic Era, and the Cenozoic Era |
| What are the 3 ways you can compare organisms? | skeletal structures, DNA and the embyonic structures |
| Who made observations that later became the foundations for his theory of evolution by natural selection? | Charles Darwin |
| What are the 4 steps to Natural Selection? | Overproduction, Genetic Variation, Struggle to Survive, and Successful Reproduction |
| What are the 3 steps to the formation of a new species? | seperation, adaptation, and division |
| relative dating | ordering fossils to estimate their age |
| absolute dating | the method of measuring the ratio of unstable atoms to stable atoms, which help determine the approximate age of a fossil |
| geologic time scale | the calendar scientists use to outline the history of life on earth |
| Pangaea | a single large landmass of the earth |
| How old is our earth? | 4.6 Billion years old |
| What is your geologic time address? | Phanerozoic, cenozoic, quaternary, holocene |
| Naturalist | Is a person who studies plants and animals by observing. |
| Variation | Is a slight difference in an inherited trail of individual members of a species. |
| Camouflage | Wants to not be seen, blends in with environment |
| Mimicry | Wants to be seen, resemblance of one species to another species. |
| Comparative anatomy | The study of similarities and differences among structures of living species. |
| Homologous structures | Body parts of organisms that are similar in structure and position but different in function. |
| analogous structures | Body parts that perform a similar function but differ in structure. |
| Vestigial structures | body parts that have lost their original function through evolution. |
| Embryology | The science of the development of embryos from fertilization to birth. |
| When compared with other fossils, what structure indicates the ancestor of whales used to walk on land? | Vestigial pelvic bones |
| What causes variations to arise in a population? | random mutations in genes. |
| What method can scientists use to determine when a fossil appeared on earth? | relative-age dating |
Created by:
sydkam
Popular Science sets