Top 100 presentations

1. Continuous Verb Tenses
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2. Support and transport in plants
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3. Anyong Tubig Anyong Lupa sa Asya
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4. Elements compounds and mixtures
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5. Chromosome
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6. Simple Verb Tenses
   20772
7. Atomic Structure
   20137
8. Balancing Chemical Equations. Balancing redox equations
   20082
9. Periodic Behavior
   19858
10. Newton’s laws of motion
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11. Periodic Trends
    16723
12. Adverbs
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13. Percent Composition, Empirical and Molecular Formulas
    15952
14. Animal Farm
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15. Bonding, Molecular Shape & Structure
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16. MakingFood
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17. Circulation and Gas Exchange
    13358
18. DNA - An overview
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19. Fungi
    12845
20. Atomic Structure and Periodic Trends
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21. Volumetric
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22. Feminism- Cure or Curse
    12524
23. Atomic Structure and Periodicity
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24. Hormones and the Endocrine System
    12079
25. Animal Development
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26. Derivation Applications of Bernoulli Principal
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27. Osmoregulation and Excretion
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28. Plasma Membrane-Gateway to the Cell
    10749
29. Plant Structure, Growth, and Development
    10650
30. Acid, bases and salts
    10197
31. Development
    10160
32. Mirrors and Lenses
    10086
33. Structure of the Atom
    9906
34. Balanced forces
    9873
35. Ancient Civilizations
    9784
36. Mass Spectrometry
    9735
37. Pronouns
    9716
38. Nouns
    9651
39. Resource Acquisition and Transport in Vascular Plants
    9433
40. Forests
    9364
41. Support and transport in plants
    9307
42. Atomic Structure
    9276
43. Cell Types and Cell Structure
    8970
44. Newton’s third law of motion
    8895
45. Animal Nutrition
    8655
46. Transplantation Immunology
    8587
47. Cellular respiration
    8485
48. Growing Plants
    8320
49. Sensory and Motor Mechanisms
    8282
50. Electrical Circuits
    8219
51. Plant Responses to Internal and External Signals
    8076
52. Lab Equipment
    8007
53. Prepositions
    7958
54. Viruses, Viroids, and Prions
    7859
55. Neurons, Synapses, and Signaling
    7827
56. Of Mice and Men
    7778
57. A Tour of the Cell
    7643
58. Basic Structure of a Cell
    7630
59. Real time PCR and it's functions in diagnosis
    7579
60. Covalent Bonding (Molecules)
    7565
61. Plant structure adaptations and responses
    7527
62. Ionic Bonding
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63. Cellular Division
    7399
64. Mendelian Genetics
    7041
65. To Kill a Mockingbird
    7033
66. Blood Type Genetics
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67. Satellite Orbits and Uses NIS
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68. Molecules and Ions
    6896
69. Well logging The Bore Hole
    6870
70. Sound
    6815
71. The Immune System
    6786
72. Membrane Structure and Function
    6701
73. Animal Reproduction
    6670
74. The Chemistry of Acids and Bases
    6622
75. Angiosperm Reproduction and Biotechnology
    6609
76. Rocks
    6591
77. Plant Diversity
    6547
78. Mendel and the Gene Idea
    6496
79. Cell Communication
    6475
80. Balancing Chemical Equations
    6465
81. Rate Laws
    6340
82. Drama
    6305
83. Hybridization of Orbitals
    6283
84. Introduction to Oscillations and Simple Harmonic Motion
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85. The Building Blocks of Matter Atoms
    6209
86. Empirical Formula
    6197
87. Electron Quantum Numbers
    6137
88. An Introduction to Metabolism
    6082
89. Translation. Protein from RNA
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90. Neurons
    6012
91. The Structure and Function of Large Biological Molecules
    5907
92. The Mole
    5891
93. Cell Membrane + Tissues & Organs Definitions
    5855
94. Photosynthesis
    5851
95. Karyotypes
    5821
96. Earthquakes
    5816
97. ADP, ATP and Cellular Respiration
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98. Endocrine System
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99. Classical greek philosophy
    5649
100. Conjunction
     5609

Research and Development, Experimental aerospace engineering center in Serbia (Space Technologies)