Ecosystems, abiotic and biotic factors Quiz
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5 questions, one answer each
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1. Which term describes all the organisms of different species living in a habitat?
- A. Population
- B. Niche
- C. Community
- D. Ecosystem
2. Which of these is an abiotic factor?
- A. Predation by foxes
- B. Soil pH
- C. Competition for light
- D. Disease caused by a virus
3. Why is a line transect better than random sampling for studying change from the bottom to the top of a shore?
- A. It removes the need for a quadrat
- B. It avoids the need to count organisms
- C. It gives a larger sample
- D. It samples at regular intervals along the gradient
4. Two species have the same niche in the same habitat. What is the most likely result?
- A. Both populations double in size
- B. Interspecific competition, and the species that is better adapted outcompetes the other
- C. They have no effect on each other
- D. They become one species
5. A quadrat of area 0.5 m² contains on average 6 plants. How many plants are there in a field of 400 m², assuming the density is uniform?
- A. 4 800
- B. 1 200
- C. 2 400
- D. 12