31.1 - Homework: Evolution by Natural Selection

Last updated over 1 year ago

17 Nsɛmmisa

31.1 - Homework: Evolution by Natural Selection

Last updated over 1 year ago

17 Nsɛmmisa

An English naturalist named Charles Darwin

went on a voyage around the world. He noticed

that animals in similar environments had similar

characteristics.

For example, in the Galapagos islands,

Darwin observed similar but non-identical species of finches on each island. He noticed that their beaks seemed to be adapted to their food source. After some time thinking and reading the work of other scientists, Darwin proposed his theory of natural selection. This states that all living things

evolved from a common ancestor.

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Word Bank: adapted offspring resources more

Here's how Darwin's theory of Evolution works:

1. Not all individuals survive and reproduce, due to predators or competition for .

2. Only individuals that are well to their environment will survive & reproduce.

3. These individuals will pass on their beneficial traits to their .

4. Over many generations, the species has evolved so that the beneficial trait is common and the less beneficial is less common or even eliminated.

Complete the example of Natural Selection by filling in the words in the word bank.
Word Bank: evolved black habitat mutation camouflaged variation predators survive reproduce trait

Natural selection changes the range of traits in a population - there are 3 ways it can change. Let’s look at a moth population that shows variation in its color, from light to dark brown. Show what would happen if this population moved into each scenario shown below.
Word Bank: dark against habitat light camouflaged lichen predators extremes decrease

Question 6