Do you guys still remember the evolution of life in I/GCSE Biology?

• Fossil – the remains of an organism that lived in the past found preserved in rock, or evidence of organisms having been there (such as footprints)
• Estimate of 30 million species on earth today

• Microorganism – single-celled organisms, such as bacteria
• Plants – organisms that photosynthesise, mostly multi-celled
• Animals – mostly multi-celled organisms that get their energy from eating other organisms
• When it comes to I/GCSE Biology, Classification = a system for grouping organisms according to their CH
• Ecological relationship = the relationship of an organism with other organisms and their physical environment in an ecosystem

• Evolutionary relationship = the existence of similar CH in different organisms because they evolved from a common ancestor
• Common ancestor = an organism or species that is a shared ancestor (in evolutionary terms) of two or more later organisms or species

• Fossils evidence of organism lived in past
• New fossil discovered = scientists use CH to group fossil with organisms today
• Fossils grouped in age = see change over time
• Change in species over time = evolution
• Refer to I/GCSE Biology,  Evolution = change in CH of species over time
• All species living now evolved from very simple cells = scientists

That's all~