Biology Ib Hl Paper

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Biology HigHer level PaPer 1 Tuesday 2 November 2010 (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.

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17 pages © International Baccalaureate Organization 2010

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[Question and image removed for copyright reasons]

2.

What is the sequence of stages during the cell cycle? A. B. C. D. G1 mitosis G1 G1     S G1 G2 G2    G2 G2 S  mitosis  cytokinesis S

 cytokinesis   mitosis

 cytokinesis S

 mitosis  …show more content…

Varieties of bacteria resistant to antibiotics reproduce faster than non-resistant varieties. Bacteria showing resistance to antibiotics survive after antibiotics are used.

17. Which taxa do Zerynthia rumina and Zerynthia polyxena share? A. B. C. D. They share the same class but not the same family. They share the same species but not the same class. They share the same class but not the same genus. They share the same family but not the same species.

18. What features distinguish Platyhelminthes from Annelida? Platyhelminthes A. B. C. D. segmented body non-segmented body bilateral symmetry no bilateral symmetry Annelida non-segmented body segmented body no bilateral symmetry bilateral symmetry

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Turn over

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19. What are the names of the organs labelled I and II in the diagram below?

I

II

I A. B. C. D. pancreas small intestine gall bladder esophagus liver

II

large intestine pancreas stomach

20. Where in a cell are antigens found? A. B. C. D. In the nucleus In the cytoplasm In the plasma membrane On the surface of the Golgi apparatus

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21. Which feature maintains a high concentration gradient of gases in the ventilation system? A. B. C. D. Thin-walled alveoli Thin-walled capillaries A moist lining of the alveoli Blood flowing in the