In I/GCSE Biology, it's crucial that you should understand the evolution of life! So, let's get started! 😆
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
In I/GCSE Biology, make sure you understand the meaning of the following terms! 🥰
Microorganism
- single-celled organisms, such as bacteria
Plants
- organisms that photosynthesis, mostly multi-celled
Animals
- mostly multi-celled organisms that get their energy from eating other organisms
Classification
➡️ a system for grouping organisms according to their characteristics.
Ecological relationship
➡️ the relationship of an organism with other organisms and their physical environment in an ecosystem
Evolutionary relationship
➡️ the existence of similar characteristics 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 characteristics to group fossil with organisms today
- Fossils grouped in age ➡️ see change over time
- Change in species over time ➡️ evolution
- Evolution ➡️ change in characteristics of species over time
- All species living now evolved from very simple cells ➡️ scientists
And we're done with this topic! Well Done!
Drafted by Alyssa (Biology)
References:
- "Fossil Of Hydrocephalus Briareus", https://media.istockphoto.com/photos/fossil-of-hydrocephalus-briareus-from-cambrian-period-found-in-picture-id683078288
- "Microorganisms and Microbes", https://i0.wp.com/www.bio-oxygen.com.au/wp-content/uploads/2016/05/bacteria-300x188.jpg?resize=300%2C188
- "Plants". Photo from the internet.
- "Animals". Photo from the internet
- "Learn about Carnivorous Plant Taxonomy", https://carnivorousplantresource.com/wp-content/uploads/2017/03/Venus_flytrap_taxonomy.jpg
- "Ecological Relationships", https://media.nationalgeographic.org/assets/photos/000/266/26619.jpg
- "Fossil Evidence", https://sites.google.com/site/sjcyear12biology/_/rsrc/1468542039123/fossil-evidence/Fossils%202.jpg