7.1 Adaptations, interdependence and competition

EasyMediumHard
123456
Question 4
Hard

A student estimates the number of dandelion plants growing on a lawn.

Figure 1 shows a plan of the garden.

A schematic plan of a garden. The outer boundary is a right-angled triangle. The bottom horizontal side is the base of the triangle, with a right angle at the bottom-right corner. The vertical side on the right has a length of 12 m. The bottom base is divided into three sections: a left segment of 5 m, a central dashed segment of 8 m representing the base of a rectangular flowerbed, and a right segment of 7 m. The rectangular flowerbed has a width of 8 m and a height of 4 m, and is labeled 'Flowerbed'. The remaining shaded region of the triangle is labeled 'Lawn'.

The student places a quadrat at 10 different random positions on the lawn. The quadrat measures 50 cm×50 cm50\text{ cm} \times 50\text{ cm}50 cm×50 cm.

The mean number of dandelion plants in each quadrat is 4.5.

Calculate the total estimated number of dandelion plants on the lawn. Give your answer to 3 significant figures.

[5]

7.1 Adaptations, interdependence and competition Questions

  1. GCSE
  2. /Biology
  3. /7.1 Adaptations, interdependence and competition