b) the mean number of seeds per m2 decreased between 1976 and 1978. Therefore less food for the finches. Therefore less finches will be surviving long enough to breed. The mean mass of seed increased so bigger beaks were an advantage and smaller beaks were not. So bigger beaks were selected for and survived and finches with smaller beaks did not survive. MS 1.4 MEAN = 212/9 = 23.5 OR 24 MODE = 22 MEDIAN = 22 MS1.5 As height increases, shoe size increases. This is a positive correlation. For example: a height of 170cm correlates with a shoe size of 8.5 and a height of 186cm correlates with a shoe size of 13 Most points are clustered around the (imaginary) line of best fit indicating a strong positive correlation. A few points are further away than the rest, for example, a height of 174 cm and a shoe size of 8. Maths in Biology Workbook 3 Geometry and trigonometry answers – Surface area = 10x3 = 30 x2 = 60 Plus 2x3 = 6 x4 = 24 60 + 24 = 84cm2 Volume = 10x3x2 = 60cm3 Surface area = 150.8cm2 Volume = 141.4 cm3
b) the mean number of seeds per m2 decreased between 1976 and 1978. Therefore less food for the finches. Therefore less finches will be surviving long enough to breed. The mean mass of seed increased so bigger beaks were an advantage and smaller beaks were not. So bigger beaks were selected for and survived and finches with smaller beaks did not survive. MS 1.4 MEAN = 212/9 = 23.5 OR 24 MODE = 22 MEDIAN = 22 MS1.5 As height increases, shoe size increases. This is a positive correlation. For example: a height of 170cm correlates with a shoe size of 8.5 and a height of 186cm correlates with a shoe size of 13 Most points are clustered around the (imaginary) line of best fit indicating a strong positive correlation. A few points are further away than the rest, for example, a height of 174 cm and a shoe size of 8. Maths in Biology Workbook 3 Geometry and trigonometry – answers Surface area = 10x3 = 30 x2 = 60 Plus 2x3 = 6 x4 = 24 60 + 24 = 84cm2 Volume = 10x3x2 = 60cm3 Surface area = 150.8cm2 Volume = 141.4 cm3
answers_to_maths_booklets.docx