Top 100 presentations

1. Continuous Verb Tenses
   35079
2. Support and transport in plants
   33613
3. Anyong Tubig Anyong Lupa sa Asya
   29170
4. Elements compounds and mixtures
   25849
5. Chromosome
   21713
6. Simple Verb Tenses
   20690
7. Balancing Chemical Equations. Balancing redox equations
   19957
8. Atomic Structure
   19900
9. Periodic Behavior
   19774
10. Newton’s laws of motion
    18687
11. Periodic Trends
    16672
12. Adverbs
    16589
13. Percent Composition, Empirical and Molecular Formulas
    15909
14. Animal Farm
    15650
15. Bonding, Molecular Shape & Structure
    14594
16. MakingFood
    13277
17. Circulation and Gas Exchange
    13234
18. DNA - An overview
    12843
19. Fungi
    12758
20. Atomic Structure and Periodic Trends
    12680
21. Volumetric
    12558
22. Feminism- Cure or Curse
    12476
23. Atomic Structure and Periodicity
    12359
24. Hormones and the Endocrine System
    11961
25. Animal Development
    11787
26. Derivation Applications of Bernoulli Principal
    11771
27. Osmoregulation and Excretion
    11264
28. Plasma Membrane-Gateway to the Cell
    10679
29. Plant Structure, Growth, and Development
    10528
30. Acid, bases and salts
    10093
31. Development
    10049
32. Mirrors and Lenses
    10006
33. Structure of the Atom
    9845
34. Balanced forces
    9806
35. Ancient Civilizations
    9713
36. Mass Spectrometry
    9685
37. Pronouns
    9682
38. Nouns
    9600
39. Forests
    9293
40. Resource Acquisition and Transport in Vascular Plants
    9284
41. Support and transport in plants
    9229
42. Atomic Structure
    9208
43. Cell Types and Cell Structure
    8926
44. Newton’s third law of motion
    8818
45. Animal Nutrition
    8557
46. Transplantation Immunology
    8503
47. Cellular respiration
    8410
48. Growing Plants
    8232
49. Sensory and Motor Mechanisms
    8176
50. Electrical Circuits
    8162
51. Lab Equipment
    7929
52. Plant Responses to Internal and External Signals
    7921
53. Prepositions
    7915
54. Viruses, Viroids, and Prions
    7787
55. Neurons, Synapses, and Signaling
    7733
56. Of Mice and Men
    7712
57. Basic Structure of a Cell
    7568
58. A Tour of the Cell
    7539
59. Covalent Bonding (Molecules)
    7515
60. Real time PCR and it's functions in diagnosis
    7513
61. Plant structure adaptations and responses
    7488
62. Ionic Bonding
    7383
63. Cellular Division
    7304
64. To Kill a Mockingbird
    6977
65. Mendelian Genetics
    6971
66. Blood Type Genetics
    6942
67. Satellite Orbits and Uses NIS
    6905
68. Molecules and Ions
    6853
69. Well logging The Bore Hole
    6799
70. The Immune System
    6682
71. Sound
    6663
72. Membrane Structure and Function
    6592
73. Animal Reproduction
    6559
74. Rocks
    6546
75. The Chemistry of Acids and Bases
    6524
76. Angiosperm Reproduction and Biotechnology
    6505
77. Plant Diversity
    6468
78. Balancing Chemical Equations
    6412
79. Mendel and the Gene Idea
    6368
80. Cell Communication
    6365
81. Rate Laws
    6281
82. Drama
    6260
83. Hybridization of Orbitals
    6244
84. Introduction to Oscillations and Simple Harmonic Motion
    6191
85. The Building Blocks of Matter Atoms
    6159
86. Empirical Formula
    6133
87. Electron Quantum Numbers
    6094
88. Translation. Protein from RNA
    6051
89. An Introduction to Metabolism
    5978
90. Neurons
    5967
91. The Mole
    5852
92. The Structure and Function of Large Biological Molecules
    5825
93. Cell Membrane + Tissues & Organs Definitions
    5806
94. Karyotypes
    5782
95. Earthquakes
    5760
96. ADP, ATP and Cellular Respiration
    5758
97. Endocrine System
    5725
98. Photosynthesis
    5701
99. Classical greek philosophy
    5570
100. Conjunction
     5568

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