Evolution P2 Flashcards

Front

Which of the following best describes the Earth's age according to scientific estimates?

Back

Very old, existing for billions of years

Front

Which type of organisms have existed on Earth the longest?

Back

Bacteria

Front

Which of the following is least likely to be found as a fossil? A dinosaur bone, A seashell, A stone, A trilobite exoskeleton

Back

A stone

Front

Which principle helps scientists determine the relative age of fossils when studying rock layers?

Back

The Law of Superposition

Front

According to the Law of Superposition, which rock layer would contain the oldest fossils?

Back

The bottom layer

Front

How has the rate of extinction changed over Earth's history?

Back

Extinction rates have varied, with periods of mass extinction followed by slower rates.

Front

Do humans have an effect on the evolution of organisms on Earth?

Back

Yes, humans can influence the evolution of organisms through activities like pollution, climate change, and selective breeding.

Front

What is the '6th extinction'?

Back

The ongoing mass extinction event caused by human activities, such as habitat destruction, climate change, and pollution.

Front

What evidence have scientists gathered to prove that whales evolved from land mammals?

Back

The discovery of whale skeletons with hind limbs, showing they once had legs.

Front

What is one key piece of evidence that supports the idea of evolutionary relationships between different species?

Back

Fossil records showing gradual changes in species over time.