Siyavula: Life Sciences Grade 10 - Cd3wd.com

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22 CHAPTER 1. LIFE AT THE MOLECULAR, CELLUAR AND TISSUE LEVELFigure 1.12
23Figure 1.13By grinding his own lenses Antonie van Leeuwenhoek was able to improve the magnication to over200 times. Antonie van Leeuwenhoek is considered to be the father of microscopy and is credited withbringing the microscope to the attention of biologists, even though simple magnifying lenses were alreadybeing produced in the 16th century. He was the rst scientist to observe unicellular organisms under themicroscope, which he named "animalcules".The rst electron microscope, which was invented by Leó Szilárd, was built in 1931 and was capable of400x magnication1.2.1.1.1 Discovery of CellsA cell is the smallest unit that can carry out the processes of life and as such is the basic unit of all livingthingsUsing a light microscope, Theodor Schwann, a zoologist, and Matthias Jakob Schleiden, a botanist, rstsuggested in 1839 that cells were the basic unit of life. Later, in 1858, the German doctor Rudolf Virchowobserved that cells divide to produce more cells. He proposed that all cells arise only from other cells. Thecollective observations of all three scientists form the cell theory.The modern priniciples of cell theory state that:• The cell is the more basic building block of all living organisms.• All cells arise from pre-existing cells by cell division.• All cells have the same basic chemical <strong>com</strong>position in organisms of similar species.
Page 1: Siyavula: Life Sciences Grade 10Col
Page 4 and 5: This selection and arrangement of c
Page 7 and 8: Subject Orientation 1What is Life S
Page 9: school, high school or university.
Page 12 and 13: 6 CHAPTER 1. LIFE AT THE MOLECULAR,
Page 14 and 15: 8 CHAPTER 1. LIFE AT THE MOLECULAR,
Page 16 and 17: 10 CHAPTER 1. LIFE AT THE MOLECULAR
Page 18: 12 CHAPTER 1. LIFE AT THE MOLECULAR
Page 21 and 22: 151.1.3.3.4 Biological importance
Page 23 and 24: 17Figure 1.81.2.6.3Functioning of e
Page 25 and 26: 19Figure 1.10Figure. X. Aloe vera h
Page 27: • Inorganic compounds can contain
Page 31 and 32: 25Figure 1.14Need annotated image w
Page 33 and 34: 27Figure 1.16Transmission electron
Page 35 and 36: 29Figure 1.181. Nucleolus 262. Nucl
Page 37 and 38: 1.2.1.1.6 MitochondriaA mitochondri
Page 39 and 40: 1.2.1.1.10 Structures unique to ani
Page 41 and 42: 35cell from bursting when water ent
Page 43 and 44: transport vesicleA vesicle that is
Page 45 and 46: State Phase Abbreviation Descriptio
Page 47 and 48: 411.3.1.3 Stages of MitosisFigure 1
Page 49 and 50: 43• The discovery of the organell
Page 51 and 52: 45You are required to produce a TYP
Page 53 and 54: 47• two heat-resistant test tubes
Page 55 and 56: 49Observation• observe the reacti
Page 57 and 58: Chapter 2Life processes in plants a
Page 59 and 60: 2.1.2 Dicot root2.1.2.1 External st
Page 61 and 62: 55Figure 2.2Diagram of xylem• Thr
Page 63 and 64: LightPlants transpire more rapidly
Page 65 and 66: 592.2.1.3 Variation:Be creative and
Page 67 and 68: 1. Fill one jar with plain water, a
Page 69 and 70: 2.5 Unit 2.2 Investigation 1 - Tree
Page 71 and 72: 652.6.1.1.4EndoskeletonThis skeleto
Page 73 and 74: Available:http://www.clisnotes.com/
Page 75 and 76: 69• provide internal core structu
Page 77 and 78: 712.7.3.3.3 Cardiac muscle• Respo
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3. Strengthen your skeleton by drin
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77i. Do you smoke?ii. Are you overw
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2.10.5Systemic circulation (to all
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(from above) vena cava, and can the
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Figure 10. Circulatory systems of s
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85Figure 2.14Table 2.5The HeartThe
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Figure 11. The relationship of the
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89Figure 2.17from mindsetOne comple
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91Figure 2.18Table 2.7.Human heartb
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93Figure 2.21Table 2.8Heartbeats ar
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95Figure 2.23Table 2.10The heart co
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2.10.15 Middle layer smooth muscle
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Chapter 3Environmental studies3.1 B
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The troposphere is the atmospheric
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3.2 Environment 63.2.1 Environment3
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105Figure 3.1Light reects o of the
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To discover how to reduce your carb
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1093.2.1.7.3 The Story of StuTo see
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Chapter 4Diversity, change and cont
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INDEX 113Index of Keywords and Term
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ATTRIBUTIONS 115AttributionsCollect
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ATTRIBUTIONS 117Module: "UNIT 2.3 T
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