'title': 'Circular statistics in biology.', 'summary': 'MT Madigan, JM Martinko, J Parker - 1997 - ' Purple nonsulfur bacteria are physiologically diverse and most can grow as …', 'snippet': 'Purple bacteria are anoxygenic phototrophs that grow phototrophically, obtaining carbon from CO2+ H2S (purple sulfur bacteria) or organic compounds (purple nonsulfur bacteria). 'title': 'Brock biology of microorganisms', 'summary': 'H Lodish, A Berk, CA Kaiser, M Krieger, MP Scott… - 2008 - ' 'snippet': 'With its acclaimed author team, cutting-edge content, emphasis on medical relevance, and coverage based on landmark experiments, Molecular Cell Biology has justly earned an impeccable reputation as an authoritative and exciting text. 'summary': 'JL Harper - Population biology of plants., 1977 - '

There are sections on dispersal, dormancy and recruitment of seedling populations, effects of neighbours, effects of predators and natural dynamics of plant populations, and plants, vegetation and evolution.

'snippet': 'The first chapter is concerned with experiments, analogies and models. 'title': 'Population biology of plants.',

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