Populations, adaptation and variation Quiz
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5 questions, one answer each
Each answer is checked as you go, with why.
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1. Which is an example of discontinuous variation?
- A. Height
- B. Mass
- C. Blood group
- D. Beak depth
2. Which sequence describes natural selection?
- A. Variation, competition, survival of the best adapted, inheritance
- B. Competition, change to fit needs, inheritance
- C. Environment changes, all adapt, all survive
- D. Strongest kills the rest, then breeds
3. Students find a mean of 4 plants per m² in a field of 500 m². What is the population estimate?
- A. 125
- B. 504
- C. 496
- D. 2000
4. Which is a reason why a species may become extinct?
- A. More food becomes available
- B. Its habitat is destroyed
- C. Its predators decline
- D. It has a lot of variation
5. Why should quadrats be placed at random?
- A. To make counting quicker
- B. To avoid bias in choosing where to sample
- C. To count only the rarest species
- D. To collect the organisms