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Biological Evidence
Chapter 13 7th grade science
Question | Answer |
---|---|
Which type of fossil forms through carbonization? | fossil film |
What is an example of a functional adaptation? | A drop in body temperature during hibernation. |
What is an example of a vestigial structure? | Pelvic bones in a whale. |
What is an example of a sudden change that could lead to the extinction of species? | Volcano erupts. |
What is the sequence by which natural selection works? | Variation, adaptation, and selection |
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-used anatomical structure. |
trait | a quality that can be passed on from 1 generation to another. |
selective breeding | breeding of organism that have certain traits. |
natural selection | process by which organisms with favorable traits survive and reproduce at a higher rate than organisms without the favorable trait. |
generation time | period between the birth of 1 generation 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 cenozoic era. |
What are the four major parts of the geologic time scale? | Eons, Eras, Periods, and epochs |
What are the 3 ways you can compare organisms? | skeletal structures, DNA, and the embryonic 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? | Over-production, 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 (isotopes) to stable atoms, which help determine the approximate age of the 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, and 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 blend in with its 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 through evolution. |
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 mutation in genes. |
What method can scientists use to determine when a fossil appeared on earth? | relative-age dating |