Natural Selection Quick Check

Living things have variation. What is an example in the giraffes below?

• they both have 4 legs

• one giraffe has a longer neck than the other

• they live the same place

• giraffes have spots but tigers have stripes

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NGSS.MS-LS4-4

Polar bears that have thicker fur survive the winter better than polar bears with thin fur. Thick fur is considered ______________.

• comouflage

• an adaptation

• a harmful mutation

• acquired trait

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NGSS.MS-LS4-4

Darwin says that birds developed different beaks because of mutations, changes in DNA. Which is true about mutations?

• mutations are always helpful

• mutations change the trait an organism has

• animals choose to have mutations

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NGSS.MS-LS4-4

Hummingbirds have grown longer beaks over time. This shows natural selection. How did natural selection most likely happen?

• a hummingbird with short beak stretched their beak longer

• Long beaked humming birds fought the short beaked hummingbirds and killed them

• the short beaked hummingbirds decided to have children with longer beaks

• The long beaked birds survived better than the short beaked birds. They passed the long beak trait to their children

Tags

NGSS.MS-LS4-4

For many generations, one species of fish had some brown fish and some blue fish. A fish-eating shark moves into the area. The blue fish are easier for the shark to see. What is likely to happen to the fish population?

• The shark will eat more blue fish than brown fish. Over time, the number of blue fish will decrease and brown fish will increase

• The blue fish will run away from the shark so only brown fish will get eaten

• All the fish will decide to turn brown so no there will be no blue fish left.

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Which of the following is NOT an adaptation?

• a grasshopper is the same color as grass so it is harder to see

• dogs that live in colder areas have thicker fur

• worms that are blue are easy to see and get eaten faster

Tags

NGSS.MS-LS4-4

Differences that occur in the same species are called...

• variation

• extinction

• natural selection

• creativity

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NGSS.MS-LS4-4

Changes in DNA are called....

• mistakes

• adenine

• genes

• mutations

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NGSS.MS-LS3-1

________ is the tendency of certain traits to become more common over time.

• inheritance

• mutation

• natural selection

• genetics

_______ are traits that help a living thing survive.

• mutations

• adaptations

• variations

• long tails

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NGSS.MS-LS4-4