Biology - Old & new species 0.0 / 5 ? BiologyOld and new speciesGCSEAQA Created by: baggiez_boiCreated on: 28-04-14 22:11 What do fossils provide? A record of organisms that lived a long time ago and evidence that animals and plants can change over long periods of time. 1 of 10 What are fossils? Preserved remains of traces of dead organisims, found in rocks. 2 of 10 How are bones and shells preserved? They are replaced by other materials as they decay. 3 of 10 How are dead animals preserved? In amber. 4 of 10 How are casts and impressions such as foot prints preserved? They are covered in layers of sediment which become rock. 5 of 10 Which invidiuals are less likely to survive and reproduce? Those that are poorly adapted to their environment. 6 of 10 When this happens to a whole species, what is this called? Extinction. 7 of 10 What five factors can cause a species to become extinct? New diseases, new predators, new/more successful competitors, changes in the environment over geological time and a single catastophic event. 8 of 10 How do new species evolve as a result of isolation? Two populations of a species become geographically seperated. 9 of 10 What is this process called? Specification. 10 of 10
Comments
No comments have yet been made