Top 100 presentations

1. Continuous Verb Tenses
   35144
2. Support and transport in plants
   33654
3. Anyong Tubig Anyong Lupa sa Asya
   29207
4. Elements compounds and mixtures
   25878
5. Chromosome
   21773
6. Simple Verb Tenses
   20715
7. Balancing Chemical Equations. Balancing redox equations
   19986
8. Atomic Structure
   19950
9. Periodic Behavior
   19808
10. Newton’s laws of motion
    18715
11. Periodic Trends
    16682
12. Adverbs
    16601
13. Percent Composition, Empirical and Molecular Formulas
    15917
14. Animal Farm
    15681
15. Bonding, Molecular Shape & Structure
    14612
16. MakingFood
    13296
17. Circulation and Gas Exchange
    13269
18. DNA - An overview
    12898
19. Fungi
    12774
20. Atomic Structure and Periodic Trends
    12707
21. Volumetric
    12579
22. Feminism- Cure or Curse
    12486
23. Atomic Structure and Periodicity
    12392
24. Hormones and the Endocrine System
    11998
25. Animal Development
    11828
26. Derivation Applications of Bernoulli Principal
    11796
27. Osmoregulation and Excretion
    11301
28. Plasma Membrane-Gateway to the Cell
    10694
29. Plant Structure, Growth, and Development
    10570
30. Acid, bases and salts
    10122
31. Development
    10074
32. Mirrors and Lenses
    10023
33. Structure of the Atom
    9865
34. Balanced forces
    9825
35. Ancient Civilizations
    9734
36. Mass Spectrometry
    9697
37. Pronouns
    9690
38. Nouns
    9616
39. Resource Acquisition and Transport in Vascular Plants
    9324
40. Forests
    9313
41. Support and transport in plants
    9250
42. Atomic Structure
    9222
43. Cell Types and Cell Structure
    8943
44. Newton’s third law of motion
    8837
45. Animal Nutrition
    8577
46. Transplantation Immunology
    8513
47. Cellular respiration
    8432
48. Growing Plants
    8255
49. Sensory and Motor Mechanisms
    8195
50. Electrical Circuits
    8174
51. Plant Responses to Internal and External Signals
    7971
52. Lab Equipment
    7948
53. Prepositions
    7926
54. Viruses, Viroids, and Prions
    7811
55. Neurons, Synapses, and Signaling
    7756
56. Of Mice and Men
    7729
57. Basic Structure of a Cell
    7584
58. A Tour of the Cell
    7560
59. Real time PCR and it's functions in diagnosis
    7531
60. Covalent Bonding (Molecules)
    7525
61. Plant structure adaptations and responses
    7503
62. Ionic Bonding
    7397
63. Cellular Division
    7332
64. To Kill a Mockingbird
    6989
65. Mendelian Genetics
    6987
66. Blood Type Genetics
    6956
67. Satellite Orbits and Uses NIS
    6928
68. Molecules and Ions
    6865
69. Well logging The Bore Hole
    6818
70. The Immune System
    6721
71. Sound
    6697
72. Membrane Structure and Function
    6616
73. Animal Reproduction
    6585
74. Rocks
    6555
75. The Chemistry of Acids and Bases
    6545
76. Angiosperm Reproduction and Biotechnology
    6528
77. Plant Diversity
    6486
78. Balancing Chemical Equations
    6421
79. Mendel and the Gene Idea
    6404
80. Cell Communication
    6397
81. Rate Laws
    6294
82. Drama
    6270
83. Hybridization of Orbitals
    6252
84. Introduction to Oscillations and Simple Harmonic Motion
    6214
85. The Building Blocks of Matter Atoms
    6176
86. Empirical Formula
    6150
87. Electron Quantum Numbers
    6107
88. Translation. Protein from RNA
    6061
89. An Introduction to Metabolism
    6009
90. Neurons
    5979
91. The Mole
    5864
92. The Structure and Function of Large Biological Molecules
    5849
93. Cell Membrane + Tissues & Organs Definitions
    5818
94. Karyotypes
    5794
95. Earthquakes
    5773
96. ADP, ATP and Cellular Respiration
    5765
97. Endocrine System
    5727
98. Photosynthesis
    5723
99. Classical greek philosophy
    5592
100. Conjunction
     5579

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