YCKSS Prelim_2024_4E1_Bio_P2 (final)

Name: Index Number: Class: YIO CHU KANG SECONDARY SCHOOL PRELIMINARY EXAMINATION 2024 SECONDARY FOUR EXPRESS BIOLOGY 6093/02 Paper 2 1 hour 45 minutes 9 September 2024 (Monday) No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your name, index number and class on the cover page. Write in dark blue or black ink. You may use a soft pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Section A Answer all questions in the spaces provided. Section B Answer one question in the spaces provided. The use of an approved scientific calculator is expected, where appropriate. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner’s Use Section A / 70 Section B / 10 Total / 80 Setter: Mr Wong Mingwei This document consists of 24 printed pages.

2 4E PRELIMINARY EXAM 2024 6093/02 SECTION A Answer all questions in this section in the spaces provided. 1 Fig. 1.1 shows a diagram showing the pathway of water into a plant. The arrows show the direction of water movement. Fig. 1.1 (a) (i) State the name of cell A and describe how it is adapted for absorption of water. name .……………………………… adaptation ....………………………………………………………………………….. ………………………………………………………………………………………….. …………………………………………………………………………………….. [1] (ii) Explain the movement of water from the soil water to the xylem vessel shown in Fig. 1.1. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. …………………………………………………………………………………….. [3] cortical cell xylem vessel soil water soil particle A

3 4E PRELIMINARY EXAM 2024 6093/02 1 (b) A student investigated the rate of transpiration in a plant. Fig. 1.2 is a diagram of the apparatus used in the investigation. Fig. 1.2 • The student watered the plant before the investigation started. • She measured the mass of water lost every five minutes. • The mass of water lost represents the rate of transpiration. • She took measurements in still air and with moving air surrounding the plant. • She plotted her results on a graph with lines labelled B and C. Fig. 1.3 shows the results. Fig. 1.3 balance plastic bag surrounding the pot to prevent water loss from the soil 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 0 5 10 15