Biodiversity

• the change in the characteristics of a species over several generations and relies on the process of natural selection

  Biodiversity
• based on the idea that all species are related and gradually change over time

  Theory of evolution
• qrelies on there being genetic variation in a population which affects the physical characteristics (phenotype) of an organism.

  Evolution
• can be directly observed or seen, such as fossil evidence.

  Direct evidence
• does not involve actual observation of evolution, can be concluded that evolution has taken place such of homologous, analogous, and vestigial structures, embryology, and biogeography.

  Indirect evidence
• In what era can the oldest fossils be found?

  Pre Cambrian
• the remnants of an creature from the primitive times.

  fossils
• qformed when an organism is covered by sediments that then harden into sandstone, slate, mudstone, or flint.

  fossils
• Where can most of the fossils be found

  Sedimentary Rocks
• Structures are classified to be homologous if they have similar embryonic origins and analogous if they are identical only in function
• refers to the structure of animals which is gradually disappearing

  Vestigial structure
• A structure of an organism with few or no functions

  Vestigial structure
• the scientific study of embryos and their development

  embryology