According to Darwin’s theory of evolution, how are the finches that live on the Galapagos Islands similar to members of a family tree? All of the finches share similar traits. All of the finches share common ancestors. All of the finches are able to reproduce. All of the finches are adapted to survive the same conditions.
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Step 1: According to Darwin's theory of evolution, all of the finches that live on the Galapagos Islands share common ancestors. Show more…
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Biology: The observation by Darwin that finches of different species on the Galápagos Islands have many similar physical characteristics supports what conclusion about the finches?
Shaiju T.
In the Galapagos Islands, Charles Darwin found many different species of finches (a type of bird) that seemed closely related. He proposed that the birds had all evolved from a common ancestor. Match the bird beaks below to the most likely food source. Explain in the chart below how the five finches pictured above most likely came to have different beaks than each other and the extinct finch.
Dave K.
Darwin's finches have been used to study how differences in bird morphology are related to differences in diet. Morphological measurements (in mm) of three species are given in the table for three traits. $$\begin{array}{|c|c|c|c|c|}\hline \text { Species } & {\text { Wing length }} & {\text { Tarsus length }} & {\text { Beak length }} \\ \hline G . \text { difficilis } & {64} & {18.1} & {9.6} \\ {G . \text { fulliginosa }} & {62.1} & {17.9} & {9.6} \\ {\text {G. scandens}} & {73.1} & {21.1} & {14.5} \\ \hline\end{array}$$ The proportion of time spent feeding on different types of food for these three species is given in the following table. $$\begin{array}{|c|c|c|c|}\hline \text { Species } & {\text { Seeds }} & {\text { Pollen }} & {\text { Other }} \\ \hline G . \text { difficilis } & {0.67} & {0.23} & {0.1} \\ {G . \text { fuliginosa }} & {0.7} & {0.28} & {0.02} \\ \hline G . \text { scandens } & {0.14} & {0} & {0.86} \\ \hline\end{array}$$ (a) Thinking of the morphology of each species as a point in $\mathbb{R}^{3},$ calculate the morphological distance between each pair of species. (b) Thinking of the diet of each species as a point in $\mathbb{R}^{3}$ , calculate the diet distance between each pair of species. (c) Do species that are morphologically most similar also tend to have the most similar diets?
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