Biology Higher Level Paper 1

1101 WordsMay 6, 20135 Pages
M09/4/BIOLO/HPM/ENG/TZ1/XX+ 22096007 Biology HigHer level PaPer 1 Wednesday 6 May 2009 (afternoon) 1 hour INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question, choose the answer you consider to be the best and indicate your choice on the answer sheet provided. 22096007 2209-6007 18 pages © International Baccalaureate Organization 2009 – 2 – 1. What does the following scatter graph show? 16 14 12 10 Variable Y 8 6 4 2 0 0 2 4 M09/4/BIOLO/HPM/ENG/TZ1/XX+ 6 8 10 12 14 16 Variable X A. B. C. D. No correlation between these variables Strong positive correlation between these variables Strong…show more content…
Which of the organisms A–D, identified by the key below, represents an Annelid? 1. Shows bilateral symmetry Does not show bilateral symmetry 2. Has a segmented body Does not have a segmented body 3. Has jointed legs Does not have jointed legs 4. Has a shell Does not have a shell go to 2 Cnidaria go to 3 go to 4 A B C D 19. Which of the following parts of the digestive system secrete proteases? Stomach A. B. C. D. Yes Yes Yes No Small Intestine Yes No No No Large Intestine No Yes No No 20. Why are antibiotics effective against bacteria but not viruses? A. B. C. D. Viruses can hide inside host cells. Bacteria are recognized as pathogens but viruses are not. The enzymes of bacteria can be inhibited by antibiotics. Viruses are resistant to antibiotics. 2209-6007 Turn over – 10 – M09/4/BIOLO/HPM/ENG/TZ1/XX+ 21. The diagram below represents the homeostatic control of body temperature. What does the part labelled X represent? muscles of skin arteriole walls skeletal muscles core body
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