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
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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
![broken image](http://custom-images.strikinglycdn.com/res/hrscywv4p/image/upload/c_limit,fl_lossy,h_9000,w_1200,f_auto,q_auto/4936730/828430_580797.png)
Plants
- organisms that photosynthesis, mostly multi-celled
![broken image](http://custom-images.strikinglycdn.com/res/hrscywv4p/image/upload/c_limit,fl_lossy,h_9000,w_1200,f_auto,q_auto/4936730/366156_254121.png)
Animals
- mostly multi-celled organisms that get their energy from eating other organisms
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Classification
➡️ a system for grouping organisms according to their characteristics.
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Ecological relationship
➡️ the relationship of an organism with other organisms and their physical environment in an ecosystem
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Evolutionary relationship
➡️ the existence of similar characteristics in different organisms because they evolved from a common ancestor
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Common ancestor
➡️ an organism or species that is a shared ancestor (in evolutionary terms) of two or more later organisms or species
![broken image](http://custom-images.strikinglycdn.com/res/hrscywv4p/image/upload/c_limit,fl_lossy,h_9000,w_1200,f_auto,q_auto/4936730/408766_721332.png)
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
![broken image](http://custom-images.strikinglycdn.com/res/hrscywv4p/image/upload/c_limit,fl_lossy,h_9000,w_1200,f_auto,q_auto/4936730/804415_114587.jpeg)
And we're done with this topic! Well Done!
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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