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