Speciation and extinction Quiz
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5 questions, one answer each
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1. Which factor is needed for two groups of one species to form separate species?
- A. They must have the same selection pressures
- B. They must interbreed regularly
- C. They must be isolated so that they cannot interbreed
- D. They must live in the same place
2. A species is extinct when:
- A. It lives only in zoos
- B. Fewer than 100 remain
- C. It has moved to a new habitat
- D. No individuals remain alive anywhere
3. Which is an example of a new predator causing extinction?
- A. Rats introduced to an island eat the eggs of ground-nesting birds
- B. A volcano buries a forest
- C. Sea level rises
- D. A bird migrates
4. What happened after the asteroid impact 66 million years ago?
- A. Plants grew faster
- B. Dust blocked sunlight, plants died and food chains collapsed
- C. Temperatures rose for millions of years
- D. Only plants became extinct
5. Why do isolated populations evolve differently?
- A. They share the same alleles
- B. Mutations are the same in each
- C. Selection pressures can be different in each environment
- D. They copy each other