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Octavia Brayley answered on 9 Nov 2023: last edited 9 Nov 2023 10:53 pm
Great question! There is a lot of evidence for evolution. I like to use the example of bacteria becoming resistant to different types of antibiotics…that’s evolution in real-time and it’s becoming a real issue around the world in medicine. There are plenty of other bits of evidence:
1. Anatomy. Species may share similar physical features because the feature was present in a common ancestor (homologous structures).
2. Molecular biology. DNA and the genetic code reflect the shared ancestry of life. DNA comparisons can show how related species are.
3. Biogeography. The global distribution of organisms and the unique features of island species reflect evolution and geological change.
4. Fossils. Fossils document the existence of now-extinct past species that are related to present-day species.
5. Direct observation. We can directly observe small-scale evolution in organisms with short lifecycles (e.g., pesticide-resistant insects).
Watch a video about the evidence:
To answer your other question about monkeys, we had a common ancestor with monkeys, but we split off from them about 30 million years ago. So we didn’t evolve from the monkeys that we see today. We took a different evolutionary path, which is why we have humans and other primates around today- we are completely different species but we do share a common ancestor that is no longer around today. And monkeys have evolved with us! Just not into humans, but they have acquired adaptations for their environment and habitat. Every organism on Earth is constantly evolving, but we can’t see these changes in our lifetime because evolution takes millions of years (apart from in bacteria). You can find out more about this here:
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Ian McKinley answered on 10 Nov 2023:
…I was going to try to answer this one, but Octavia has done such a great job that there’s nothing else that I can add!
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Andrew Lyon answered on 15 Nov 2023:
I can’t really add anything to Octavia’s answer below.
I would say this is a really good question and an excellent example of scientific thinking.
You’ve thought of a question and your observation doesn’t provide an answer. Octavia demonstrates what a scientist would do next. She has researched what evidence is available, considered what this evidence says and presented her conclusions based on this evidence.
A great example of the scientific method!
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