Charles Darwin

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Scientific Biographies

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Charles Darwin

4. Refute

When Charles Darwin visited the Galapagos Islands (located in the Pacific Ocean), he observed several species of finches, each uniquely adapted to a very specific habitat. In particular, the beaks of the finches were quite variable and seemed to play important roles in how the birds obtained food. Darwin wanted to understand the forces that allowed so many different varieties of finch to coexist successfully in such a small geographic area. His observations caused him to wonder.


Charles Darwin (1809-1882):

1. Observation

2. Hypothesis

3. Evidence


Charles Darwin’s hypothesis (over evolution) was that all the species undergo natural selection. Natural selection is the process in which organisms develop adaptations where they are more likely to survive and reproduce in the environment they live in.

Darwin found major findings when he studied the animals on the Galapagos Islands. He compared the same species of animal, a finch, on the different islands and on the mainland and found out that they all had different beak sizes. Taking in consideration of the natural selection, the beaks of the same species of bird were different because the birds went through variations which would help them survive in the their environments, in this case equipping them with the right beak size to acquire specific food sources.

The ideas of evolution angered the church. Religious scientists and bishops argued against his findings and disapproved of any evidences. They believed that all organisms came straight from god. At the time the people listened and followed the church disapproving of the concept of evolution.


Natural selection is a production of variation in one species making the organism more suitable and more likely to survive in this environment. Organisms with such characteristics which increase their probability to survive in their environment, have higher chances of reproducing and making more offspring which could also benefit from the advantageous heritable variation. The organisms with no variation are more likely to die off because of the over power of the stronger organisms which contain the variation.


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