Evolution
Storyboard Tekst
- The marsupials of Australia, Darwin's finches in the Galápagos, and many species on the Hawaiian Islands are unique to their island settings, but have distant relationships to ancestral species on mainlands. This combination of features reflects the processes by which island species evolve. They often arise from mainland ancestors – for example, when a landmass breaks off or a few individuals are blown off course during a storm – and diverge (become increasingly different) as they adapt in isolation to the island environment.
- The evolution of unique species on islands is another example of how evolutionand geography intersect.
- For instance, most of the mammal species in Australia are marsupials (carry young in a pouch), while most mammal species elsewhere in the world are placental (nourish young through a placenta). Australia’s marsupial species are very diverse and fill a wide range of ecological roles.
- Sanmartín, I. (2012). Historical Biogeography: Evolution in Time and Space. Evolution: Education and Outreach, 5(4), 555–568.https://evolution-outreach.biomedcentral.com/articles/10.1007/s12052-012-0421-2
- biogeography | Description Facts | Britannica. (n.d.). Www.britannica.com.https://www.britannica.com/science/biogeography#:~:text=biogeography%2C%20the%20study%20of%20the,responsible%20for%20variations%20in%20distribution.
- Bibaliography
- Molecular Biology is the branch of biology that deals with the structure and function of the macromolecules (e.g. proteins and nucleic acids) essential to life.
- Molecular similarities provide evidence for the shared ancestry of life. DNA sequence comparisons can show how different species are related.Like structural homologies, similarities between biological molecules can reflect shared evolutionary ancestry.
- At the most basic level, all living organisms share:The same genetic material (DNA)The same, or highly similar, genetic codesThe same basic process of gene expression (transcription and translation)
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