Microbiology 175 Genetics 174 Biochemistry 154 Statistics 152 Entomology 112 Metabolism 97 Photosynthesis 96 metabolism 94 Botany 88 Fungi 82 Physiology 81 Insects 75 Zoology 75 Ecology 73 Biology 69 morphology 58 Plant physiology 56 genetics 55 Organic chemistry 54 enzymes 54 Cytology 52 Mathematics 49 Morphology 49 Plant growth 49 Bacteria 45 Chromosomes 45 fungi 45 photosynthesis 45 Virus research 44 Mycology 43