Ch 6 Changes Over Time Test

A species is a group of organisms that can 

• compete against one another
• adapt to new conditions in the environment
• eat the same food
• mate with one another and have offspring

On his ocean voyage, Charles Darwin observed that living things

• in South America were exactly like the ones in England
• on the Galapagos Islands had some differences from those on the mainland of South America
• in England were like the fossils found in South America
• on the Galapagos Islands were exactly the same as those on the mainland of South America

An adaptation is any trait that helps a living thing

• survive and reproduce
• overproduce variations
• become larger
• get stronger

Limited food, water, and shelter result in

• fossils
• a change in environment
• competition
• overproduction

Which is used by scientists to find out how different species are related?

• the locations of islands in the ocean
• the size of the organism
• the DNA of the organisms
• the temperature of the environment

Which of the following provides evidence that living things have changed over time?

• Fossils
• Competition
• Overproduction
• Geologic Time Scale

New species can form when

• a small group is isolated from the rest of its species
• the species has too much variation
• the species becomes extinct
• a species overproduces

Most fossils form when the remains of living things are buried in

• leaves, stems, and roots
• molds
• sediments
• casts

In layers of rock, the oldest fossil would be found in

• on the surface of the Earth
• A. the top rock layer
• B. the middle rock layer
• C. the lowest rock layer

Many scientists think that mass extinctions were caused by

• rock slides
• climate changes
• variation in species
• overpopulation