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Do you guys still remember the evolution of life in I/GCSE Biology?
Life on earth
- 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
Relationships between living organisms
- 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
Mammals | Fish |
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- 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
Fossil evidence
- 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~
