Organism Relationships and Evolution Quiz

Why do scientists study how organisms are related?

• To decide which organism is best

• To understand evolutionary history

• To rank organisms by size

• To predict future species

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Which evidence best shows that two organisms may be related?

• They live in the same place

• They have similar body structures

• They are the same size

• They eat the same food

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What does the term common ancestor mean?

• The strongest organism

• A living organism today

• An organism shared in the past

• The most evolved organism

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Why might scientists use DNA to compare organisms?

• DNA shows personality

• DNA shows shared ancestry

• DNA shows habitat

• DNA shows age

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Which statement about evolution is TRUE?

• Some organisms stop evolving

• Only animals evolve

• All living organisms continue to evolve

• Humans evolved from modern apes

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Two organisms look very different. What could still be true?

• They are not related

• One is more evolved

• They share a common ancestor

• They evolved at different times

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Which feature would scientists MOST likely compare?

• Color patterns

• Body parts

• Personality traits

• Habitat size

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Why are scientific diagrams useful?

• They prove facts

• They replace experiments

• They help organize information

• They show opinions

Which question reflects scientific thinking?

• Which animal is better?

• Which organism is more advanced?

• Which organisms share traits?

• Which animal is faster?

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If two organisms share many traits, they are likely

• the same species

• closely related

• competitors

• unrelated

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