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| biological species concept: |
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| definition of a species as a population or group of populations whose members can breed with one another in nature and produce fertile offspring |
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| major biological changes evident in the fossil record |
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| condition in which a reproductive barrier keeps two species from interbreeding |
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| separation of populations as a result of geographic change or migration to geographically isolated places |
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| List 3 types of prezygotic reproductive barriers. |
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| mechanical, temporal, behavioral |
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| Give an example of geographic isolation. |
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| Two populations of squirrels are separated by a river that was once dry and reforms, separating them by water. |
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| Give an example of adaptive radiation. |
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Darwin's finches that be believes started from a single ancestor on the main island. |
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| study of multicellular organisms as they develop from fertilized eggs to fully formed organisms |
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| How does evolution produce complex structures such as the eye? |
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| It makes MANY MANY small changes over a period of time. The stages inbetween are all a benefit to the organism...unlike the horse developing wheels. |
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| Earth's history organized into four eras: Precambrian, Paleozoic, Mesozoic, and Cenozoic |
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| determination of absolute ages of rocks and fossils through calculations based on a radioactive isotope's fixed rate of decay |
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| time it takes for 50 percent of a radioactive isotope sample to decay |
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| motion of continents about Earth's surface on plates of crust floating on the hot mantle |
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| episode of great species loss |
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| How do you know that fossils found in layer 5 are older than those in layer 1?[image] |
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| Because 1 had to have formed AFTER 5. An organism doesn't fall UNDER rock layers and become a fossil. It dies and becomes buried. |
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| How does mass extinction usually affect biodiversity? |
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It decreases diversity ALOT |
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Using either radiocarbon dating or indirectly through age of rock layers and or index fossils. |
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| What part of organisms usually forms fossils? |
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| The harder more durable portions such as bone and or shell. |
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| identification, naming, and classification of species |
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| two-part Latin name of a species |
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| What does the first part of a binomial name mean? |
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| It is the genus the organism belongs in. |
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| branching diagram, suggesting evolutionary relationships, that classifies species into groups within groups |
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| process in which unrelated species from similar environments have adaptations that seem very similar |
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| Butterflies and birds both developing flight is an example of: |
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| similarities among unrelated species that result from convergent evolution |
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| Wings of butterflies and wings of birds would be considered..... |
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| homologous characteristic that unites organisms as a group |
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| phylogenetic tree constructed from a series of two-way branch points, suggesting ancestral relationships among species |
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Hair on all mammals is an example of: |
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[image]What is this picture of? |
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What are the different parts of the diagram (in different colors called?) [image] |
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What is this diagram called? [image] |
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| What are advantages of scientific names. |
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They are universal regardless of language so less confusion and miscommunication amongst scientists. |
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How many domains are in our current system? Name them. |
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3 Eubacteria Archaebacteria Eukaryote |
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How many kingdoms do we currently recognise? Name them. |
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Plantae Bacteria Archabacteria Fungi Anamalia Protista |
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| What do you call a diagram/chart that helps you identify and classify an organsim? |
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