Biological Change: Unity and Diversity

Natural selection means

• those with any traits will survive and reproduce

• those with changing traits will survive and reproduce

• those with traits best suited for the environment will survive and reproduce

• the strongest will survive and reproduce

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Some insects on an island survive while other insects do not survive. The insect populations that did survive

• had an advantageous trait

• choose a trait that was suitable for the environment

• moved away

• were not strong enough

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The picture of the horse bone fossils shows that

• horses changed very quickly into what we see today

• horses are smaller today than they were a long time ago

• the fossils did not have any similarities

• the horse changed over long periods of time

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What provides evidence of organisms that lived in the past?

• soil

• blood

• fossils

• rocks

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What caused the finch beaks to look different on the Galapagos Islands?

• The birds were different species.

• Each beak was adapted to finding water.

• Each beak was adapted to a type of food.

• The birds competed with each other for food.

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Think about animals that live in water. Which adaptation would best suit an animal in aquatic conditions?

• sharp claws for catching prey

• curling into a ball when threatened

• oily fur to keep dry even in water

• hunting at night

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What can tell how closely two organisms are related?

• MRI

• CAT

• DNA

• DOG

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A fish had a mutation which caused a change in coloration. After many years, most of the new fish population had this mutation. What most likely caused this?

• Several fish got the mutation at the same time.

• The fish with the mutation was better suited for the environment.

• The fish choose the mutation to have an advantage.

• The mutation was contagious.

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According to natural selection, in a population of frogs

• the strongest frogs will survive and reproduce

• the frogs that are best camouflaged will survive and reproduce

• the frog with traits best suited to the environment will survive and reproduce

• the frogs with the best reflexes will survive and reproduce

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Provides evidence about the order in which species have existed and changed over time.

• Fossil Record

• Fossils University

• Dino Tales

• Fossil Facts

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