Which method would give the best estimate of the number of daisies on a school field?
Answer and explanation
Correct answer: D. Use quadrats placed at random positions and scale up the mean count
- Step 1: Sampling must be random to avoid bias. Step 2. The mean from several quadrats is multiplied by the area. Answer: Use quadrats placed at random positions and scale up the mean count. Why not the others: One crowded quadrat would give a biased estimate.
Practise more Ecology.
Free questions with an explanation for every one, and full timed UK GCSE mock tests.
More Ecology questions
- What is a producer in a food chain?
- In the food chain grass, rabbit, fox, what is the rabbit?
- What is the effect on a population of rabbits if the number of foxes falls sharply?
- Why is only about 10 percent of the energy passed on at each trophic level?
- Which gas is produced by the decay of dead plants in conditions with no oxygen?
- Which process returns carbon dioxide to the atmosphere?