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15
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According to the article, what was the appearance of the earliest mammalian ancestor?
A small, mouse-like creature.
A fish with gills and fins.
A single-celled organism.
A large blue whale-like animal.
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seesaw
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15
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What is the significance of all living things sharing basic traits like cell structure and DNA?
It demonstrates how whales are more advanced than fish.
It explains why mammals are the most complex organisms.
It shows that all life evolved from a common ancestor.
It proves that all life on Earth is unrelated.
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15
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What evidence do paleontologists use to trace evolutionary connections between species?
Fossilized remains and DNA analysis.
Observing the habits of modern animals.
Studying their diets.
Comparing the color of their skin.
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15
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What do the small leg bones in blue whales indicate?
Whales once had ancestors that walked on land.
They serve no evolutionary purpose.
Whales are still evolving into land animals.
They are used for swimming.
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What does the presence of shared body structures between species suggest?
A shared evolutionary history.
They have similar diets.
They have no differences.
They evolved at the same time.
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15
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What is the main reason why blue whales are not considered fish?
Their body structure is more similar to mammals than to f
They eat different types of food than fish.
They do not live entirely underwater.
They are too large to be fish.
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How do scientists visualize what extinct ancestors looked like?
By using skeletal and fossil evidence.
By guessing based on modern animals.
By combining DNA from living species.
By studying ancient paintings.
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15
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Which of the following is a characteristic shared by humans and blue whales?
Both have scales on their bodies.
Both breathe through gills.
Both lay eggs.
Both have lungs for breathing air.
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What is inferred about the common ancestor of mammals, including humans and whales?
It lived about 4 billion years ago.
It had a skeleton identical to humans.
It was a large aquatic animal.
It had structures similar to modern mammals.
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How do whales and humans demonstrate their mammalian connection?
By having lungs, producing milk, and similar bone structures
By walking on land regularly.
By laying eggs and having shiny scales.
By living in the ocean.
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