Biomathematics 2 Botany 2 Lichens 2 Arid regions 1 Behavior 1 Biological chemistry 1 Biological control systems 1 Chemistry, Physical and theoretical 1 Classification 1 Ecology 1 Endocrinology 1 Evolution 1 Flowers 1 Forest ecology 1 Fungi 1 Genetics 1 Influence of environment 1 Invertebrates 1 Man 1 Mathematical models 1 Mathematics 1 Morphology 1 Parasitism 1 Physiological effect 1 Physiology 1 Plant physiology 1 Primates 1 Social behavior in animals 1 System analysis 1 Technique 1