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Science Maddie
life science chapter 5
Question | Answer |
---|---|
Species | A group of similar organisms that can mate and reproduce fertile offspring. |
Adaption | A trait that helps an organism survive and reproduce. |
Evolution | The gradual change in species over time. |
Scientific Theory | A well-tested concept that explains a wide range of observations. |
Artifical Selection | Man-made reproductions to get the offspring to your needs. |
Natural Selection | Nature lets species reproduce over time....4 step process. |
Overproduction | Most species produce far more offspring than can possibly survive. |
Competition | The offspring fight to survive. |
Variation | Any difference between individuals of the same species. |
Selection | Mother nature decides who lives and who dies. |
Geologic Isolation | The littlest scale...happens by a mountain chain. |
Continental Drift | The movement of the Earth's continents relative to each other. |
Fossil | The preserved remains or traces of an organism that lived in the past. |
Sedimentary Rock | The type of rock that only preserves fossils. |
Petrified Fossil | Minerals that replace bones over time. |
Cast & Mold | Type of petrified fossil that comes in pairs. |
Preserved Remains | A fossil that still has organic materials. |
Extinct | A whole species that dies out. |
Relative Dating | Using common knowledge to find out the age of a fossil. |
Abosolute Dating | Finding the exact age of a fossil. |
Fossil Record | A book/catalog of every fossil ever dug up. |
Geologic Time Scale | A time line of every species on Earth. |
Gradualism | Evolution appears slowly but steadily. |
Punctuated Equilibria | Evolution that occurs short periods of nothing but all of a sudden a big change. |
Branching Tree | A diagram that shows the realtionship between organisms. |
Embryo | Any organism before it hatches, is born, or germinates. |
Homologous Structures | Body parts that are structuraly similar in related species. |