Population size and competition Quiz
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5 questions, one answer each
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1. Which of the following best defines carrying capacity?
- A. The maximum population size an ecosystem can support indefinitely
- B. The largest population a species has ever reached
- C. The number of species in an ecosystem
- D. The rate at which a population grows
2. Two species of finch both eat the same seeds and the larger finch survives better. This is an example of:
- A. Intraspecific competition
- B. Predation
- C. Interspecific competition
- D. Negative feedback only
3. Which is an abiotic factor that can limit a plant population?
- A. A grazing herbivore
- B. Low light intensity
- C. A competing plant species
- D. A fungal pathogen
4. In a predator-prey cycle, why does the predator population fall after the prey population has fallen?
- A. Predators migrate to the prey
- B. Prey become better camouflaged
- C. Predators compete with prey for food
- D. There is less food, so predators starve or breed less
5. As a population of the same species grows, competition for resources increases. The effect on the death rate and birth rate is that:
- A. Both fall
- B. Death rate falls and birth rate rises
- C. Death rate rises and birth rate falls
- D. Neither changes