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Evolution notes ty
| Question | Answer |
|---|---|
| Evolution | generation-to-generation change in the proportion of different inherited genes in a population that accounts for all of the changes that have transformed life over an immense time |
| Species | distinct form of life |
| Genes | unit of inherited information in DNA |
| Survival of the fittest | the contribution that an individual makes to the gene pool of the next generation compared to the contributions of other individuals |
| How can evolution refine existing adaptations | a complex structure may have evolved from a simpler structure having the same basic function |
| How was chitin modified to serve an additional function | species of different animals were adapted to their new environment so the exoskeleton of that they were adapted to something else to help them survive on different terrains(land or water). |
| How were flippers of penguins modified for new function | penguins were in barren islands and other remote locations in the Southern Hemisphere where flight would offer little advantage for either escape or hunting so there wings adapted into flippers which made them able to be very good swimmers |
| Embryology | the study of the process of multicellular organisms as they develop from fertilized eggs to fully formed organisms |
| Fossils | preserved remains or markings left by organisms that lived in the past |
| Fossil record | is a chronological collection of life's remains in the rock layers, recorded during the passage of time |
| Basilosaurus fossils suggest that | that ancient whales evolved from ancestors with hind limbs (40 million years ago these whales could no longer support their weight so flippers were formed from the hind limb they had |
| Geographic distribution | serves as a clue to how modern species may have evolved |
| Homologous Structures | similar structure found in more than one species that share a common ancestor |
| Vestigial structures | are remnants of structures that may have had important functions in an ancestral species, but have no clear function in some of the modern descendants |
| Similarities in development (embryological evidence) | structures during development support other evidence that all verebrates evolve from a common ancestor |
| DNA sequences and molecular evidence | the common genetic code shared by all species and the evidence that supports evolution as an explanation for the unity and diversity of life |
| How do fossils form | they form from the remains of organisms buried by sediments,dust,or volcanic ash |
| Geologic time scale | organizes Earth's history into 3 distinct ages known as the Paleozoic, Mesozoic, and Cenozoic eras |
| Relative dating of fossils | reflects the order in which groups of species existed compared to one another |
| Radiometric dating | based on the measurement of certain radioactive isotopes in objects |
| Half-life | the number of years it takes for 50% of the original sample to decay |
| Continental drift | landmass on different plates change position relative to each other as a result of movement |
| Pangaea | one of the 2nd major event of the continental drift over 180 million years ago where the continents started to break apart and each became an isolated and separate evolutionary arena |
Created by:
tymonster22
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