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
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Introduction Ecology may be broadly defined as the study of the interrelationships or interactions among the different components of the ecosystem. All the ecosystem components are directly and /or indirectly linked with one another. “There is constant interchange of various kinds within each system‚ not only between the organic and inorganic” (Tansley‚1935). The linking forces are two processes: the energy flow process‚ and the biochemical cycle. In other words‚ ecosystem components are
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multicellular and heterotrophs Most reproduce sexually Live in terrestrial and aquatic habitats Cell walls are absent Plantae All are multicellular and autotrophs Reproduce sexually and asexually Most are terrestrial Cell wall are present Fungi Most are multicellular and all are heterotrophs Reproduce sexually and asexually Most are terrestrial Cell walls are present Protista Most are single celled‚ some multicellular‚ some eukaryotic Some are heterotrophs‚ some are autotrophs‚ some are
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relationships between living organisms and between organisms and their environment 5.1.2 Distinguish between autotroph and heterotroph Autotroph: An organism that synthesises its organic molecules from simple inorgance substances (e.g. CO2 and nitrates) - autotrophs are producers Heterotroph: An organism that obtains organic molecules from other organisms - heterotrophs are consumers 5.1.3 Distinguish between consumers‚ detritivores and saprotrophs Consumer: An organism that
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1. What organic molecules make up the largest part of a cell membrane? a. Lipids 2. Which of the following is presumed to have been engulfed by an ancestral eukaryote and became a eukaryote organ? b. Chloroplast 3. Which of the following is correct about mitochondria? c. Most cells plants contain a mitochondria 4. Horse eating hay is an example of? d. a consumer eating a producer 5. Structure of ATP is MOST similar to the structure of? e. RNA molecules
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Standard B-3: The student will demonstrate an understanding of the flow of energy within and between living systems. B-3.1 Summarize the overall process by which photosynthesis converts solar energy into chemical energy and interpret the chemical equation for the process. Taxonomy Level: 2.4-B and 2.1-B Understand Conceptual Knowledge Key Concepts: Photosynthesis: light-dependent reactions‚ dark (light-independent) reactions Previous knowledge: In 6th grade (6-2.7)‚ students summarized the
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Chapter 25 Pre-Test Question 1 Part A Miller and Urey’s experiments that attempted to recreate conditions on early Earth were significant because _____. Hint 1. They gave credence to the idea of abiotic synthesis. ANSWER: they showed how polymers could form spontaneously on a clay substrate they produced the first protocells they showed how radiometric dating could be used to give the absolute ages of rocks and fossils proved the endosymbiotic theory they showed that organic
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Biology Notes 1. Organisms are made of cells that have similar structural characteristics. 1 Outline the historical development of the cell theory‚ in particular the contributions of Robert Hooke and Robert Brown. The development of the cell theory starts in the 1600ʼs with Robert Hookeʼs discovery of cells when viewing a piece of cork under a microscope and describing them as a nun house. Anton van Leeuwenhoek was crucial in the development of microscopes making simple microscopes through advanced
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1. The classification system developed by Linnaeus in the early 1700s divided living organisms into plant and animal kingdoms. Today‚ that has been expanded into five kingdoms. Which of the following inventions was most responsible for creating the need for the additional three kingdoms and why? (2 points) (0 pts) Fossil fuel-based transportation made it easier to explore and discover new species. (0 pts) Genetic engineering created new species which then needed new kingdoms. (2 pts) Microscopes
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Abiotic component abiotic components (also known as abiotic factors) are non-living chemical and physical factors in the environment‚ which affect ecosystems. Each abiotic component influences the number and variety of plants that grow in an ecosystem‚ which in turn has an influence on the variety of animals that live there. The four major abiotic components are: climate‚ parent material and soil‚ topography‚ and natural disturbances. From the viewpoint of biology‚ abiotic factors can be classified
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