Natural Selection Formative

During dry years on a remote island chain, small seeds become rare while large seeds in hard shells remain fairly abundant. The large seeds in hard shells can be eaten only by birds with large beaks.
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​Which of the following best describes how natural selection will most likely affect seed-eating birds on the island chain during an extended dry period?

• Birds with small beaks will adapt and develop large beaks.

• Birds with large beaks will interbreed with birds with small beaks.

• Birds with large beaks will produce more offspring than birds with small beaks.

• Birds with small beaks will immigrate in greater numbers than birds with large beaks.

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The fur of an arctic fox changes from white to brown as the winter snow melts and spring emerges. The foxes' ability to change its fur is an example of _________.

•  natural selection

• an adaptation

• an environmental change

• a variation

In his Theory of Evolution, Darwin wrote that organisms with traits best suited to their environment would  

• move away from their environment.

• decrease in numbers.

• increase in numbers.

• go extinct.

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Charles Darwin studied finches from the Galapagos Islands, fossils, and the diversity of species for many years. He wrote his findings in a controversial book called the Origin of Species. He was most famous for which theory?

• Theory of Evolution

• Theory of Selective Breeding

• Theory of Adaptation

• Theory of Artificial Selection

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Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.

• Because the come from dominant alleles.

• Because they come from recessive alleles.

• Because the trait is an acquired phenotype.

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