Biodiversity and Evolution

• Fossils- these are traces of an organism that loved in the past and preserve by natural process or Catastrophic  event.
• Paleontologist - is a person who study fossils 
• Sedimentary rock- where most fossils found
• What are the hard parts of the organism in sedimentary rock?

  Woody stem

  Bones

  Teeth
• Imprint- a shallow external molds left by an organism tissue with no little matetials
• Compression- a fossils that has organic materials
• Position of sedimentary rock- this is how paleontologist find the age of fossils
• Bottom layer- where fossils found to be older
• Relative dating-  is a method used to determine the age of the rocks by comparing them with the rocks in the other layer. 
• Invertebrates  -one of the first and oldest organisms that lived on earth.
• Radiometric dating- is a method used to determine the age of rocks using the decay of radioactive isotopes present in rock
• Carbon-14 - this has all the organism, when The organism dies, this starts to decay
• Carbon dating  -used to tell the age of organic materials
• Homologous - this has the same internal framework or origin , position but different function
• Analogous- has the same function but different origin
• Homologous- a strong indicator that organism evolve from the same spicies
• Divergent evolution - this evolution states that every evolution in animals came from the same ancestor
• Divergent evolution  -is the splitting of  an ancestral population into two or more subpopulations that are geographically isolated from one another
• Convergent  -an increase in similarities among species derived from different ancestors as a result of similar adaptation to similar environment.