AS BIOLOGY Paper 2. EXAM QUESTIONS AND ANSWERS. RATED A+

Document Content and Description Below

Littorina littorea is a species of snail found on rocky sea shores. A student investigated variation in snail shell height in two populations of snails. Give two ways in which the student could ensu... re his samples would provide a reliable measure of the variation between individuals in each population. [2 marks] 1 2 0 1 . 2 The student could determine the median, mode and range from his measurement of shell heights in these populations. Give two other statistical values the student could calculate from his measurement of shell heights in these populations. [1 mark] 1 2 0 1 . 3 Name the taxon in the hierarchy of classification represented by: [1 mark] 1 Littorina 2 Iittorea3 *03* Turn over ► IB/M/Jun20/7401/2 Do not write outside the 0 1 . 4 The student noticed there was a difference in shell height between these populations box of snails. He wanted to investigate if the difference was significant. Give a suitable null hypothesis to use in his investigation and name the statistical test to use with these data. [2 marks] Null hypothesis Statistical test Turn over for the next question [Show More]

Last updated: 1 year ago

Preview 1 out of 32 pages