morphology metabolism 22 photosynthesis 15 Plant cell 14 Zoology 12 enzymes 12 protoplasm 12 Microbiology 8 Photosynthesis 3 cytology 3 viruses 3 Botany 2 Plant cells 2 Plant diseases 2 anatomy 2 bacteria 2 entomology in india 2 fungi 2 genetics 2 origin of insects 2 physiology 2 taxonomy 2 Bacteriology 1 Bio chemistry 1 Biological stains 1 Biology-earthworms 1 Blue-green algae 1 Cryogenetics 1 Cytology 1 Dendochronology 1