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In this blog post, we are looking at how a theory is formed in I/GCSE Biology!
Other theories of evolution
- Richard Owen explain similarities between species – suggests god created basic plans that developed in different ways
- Lamarck suggested species could change – most scientists believe they remain the same
- Lamarck idea – environment caused changes in species and changes were passed on to offspring
The problem with Darwin’s theory
In I/GCSE Biology, don't forget to remember the following points!
- Theory rejected – didn’t consider god as creator
- Little evidence for natural selection causing change + creating new species
- Darwin can't explain how characteristics pass from parent to offspring
The acceptance of Darwin’s theory
- Theory used to make predictions tested scientifically
- Beak size of finches in Galapagos Islands when a drought broke out and harder seeds were produced.
- Birds who ate the most food and had larger, stronger beaks survived. In years beak size should increase.
And we're done with this topic! Well Done!
Drafted by Alyssa (Biology)
References:
- "Richard Owen quote", https://www.azquotes.com/picture-quotes/quote-cuvier-had-preceded-lamarck-in-specifying-the-kinds-and-degrees-of-variation-which-his-richard-owen-100-27-67.jpg
- "Rejection of evolution by religious group", https://upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Anti-EvolutionLeague.jpg/220px-Anti-EvolutionLeague.jpg
- "Pin on galapagos", https://i.pinimg.com/originals/05/a7/c3/05a7c32aad81cabce83978db65916355.jpg