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- 1. Multiple Choice
What is a scientific theory?
An explanation that makes a lot of sense
An explanation that is supported by evidence
An explanation that is popular among the public
An explanation that has been proved and is now scientific law
- 2. Multiple Choice
What can humans do to make sure that fish species don't go extinct?
Destroy sharks and other predators in the ocean
Stop the practice of overfishing
Practice strategies related to overfishing
Stay away from oceans
- 3. Multiple Choice
The Bald Eagle almost went extinct when humans began using a pesticide called DDT. What can you conclude from the fact that the Bald Eagle population have since increased.
The Bald Eagle is one of the healthiest birds on Earth.
The pesticide was banned.
The eagles learned to stay away from DDT.
The Bald Eagle quickly evolved to tolerate the pesticide.
- 4. Multiple Choice
According to most scientists, what is the ultimate cause of most mass extinctions.
Overhuntin
Overfishing
Evolution of a new species to replace an old species
Major changes in the environment
- 5. Multiple Choice
Two organisms have homologous structures. Which can most likely be concluded about the two organisms?
They are unrelated.
They are the same organisms.
They share a common ancestor.
They evolved in a similar environment.
- 6. Multiple Choice
What can be inferred from observed characteristics of land animals and aquatic animals.
They are classified as the same species.
They have the same dietary habits.
They evolved from humans.
They share a common ancestor.
- 7. Multiple Choice
Scientist believe that dolphins and whales may have evolved from a common ancestor. What evidence supports this hypothesis?
They swim the same way.
They have the same dietary habits.
They live in similar environments.
They have similar anatomy.
- 8. Multiple Choice
Evolution can best be described as
Extreme Change
Absolute Change
Relative Change
Gradual Change
- 9. Multiple Choice
What can scientists most likely conclude from fossil records?
Extinction is rare.
Extinction is common.
Extinction has occurred at exact intervals throughout geological time.
Extinction has never occurred in plant species, only in animals.
- 10. Multiple Choice
Based on the fossil record, which organisms were most likely to have existed first?
Plants
Bacteria
Jellyfish
Insects
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