Science 30 Diploma Examination January 2001

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6. Light entering the eye strikes the light-sensitive rods and cones in the retina.Which of the following statements describes the properties of these receptor cells?A. Rods are sensitive to dim light and colour.B. Cones are sensitive to bright light and colour.C. Neither rods nor cones are sensitive to colour.D. Rods and cones are both sensitive to light and colour.7. When light passes through the cornea and lens, it bends. This bending of light iscalledA. reflectionB. refractionC. total internal reflectionD. total internal refractionUse the following information to answer the next question.The Human Eye1324Numerical Response4. Match the eye structure, as labelled above, with the name of the structures given below.Retina _____ (Record in the first column.)Lens _____ (Record in the second column.)Cornea _____ (Record in the third column.)Optic Nerve _____ (Record in the fourth column.)(Record all four digits of your answer in the numerical-response section on the answer sheet.)4
8. The eye structure that changes shape in order to focus on distant or close objectsis theA. lensB. retinaC. corneaD. optic nerveUse the following information to answer the next two questions.Red–Green Colourblindness PedigreeI1 2II1 2 3 45III1 2349. A doctor used the colourblindness pedigree above to trace red–greencolourblindness in a family. According to this pedigree, how many women in thefamily are colourblind?A. OneB. FourC. FiveD. None10. The genotype and phenotype of II-5 are, respectively,A. homozygous and colourblindB. heterozygous and colourblindC. homozygous and not colourblindD. heterozygous and not colourblind5
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Science 30 Diploma Examination January 2001

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