Size Doesn't Matter: Towards a More Inclusive Philosophy of Biology

notes: As the primary author, O’Malley drafted the paper, and gathered and analysed data (scientific papers and talks). Conceptual analysis was conducted by both authors.publication-status: Publishedtypes: ArticlePhilosophers of biology, along with everyone else, generally perceive life to fall into two broad categories, the microbes and macrobes, and then pay most of their attention to the latter. ‘Macrobe’ is the word we propose for larger life forms, and we use it as part of an argument for microbial equality. We suggest that taking more notice of microbes – the dominant life form on the planet, both now and throughout evolutionary history – will transform some of the philosophy of biology’s standard ideas on ontology, evolution, taxonomy and biodiversity. We set out a number of recent developments in microbiology – including biofilm formation, chemotaxis, quorum sensing and gene transfer – that highlight microbial capacities for cooperation and communication and break down conventional thinking that microbes are solely or primarily single-celled organisms. These insights also bring new perspectives to the levels of selection debate, as well as to discussions of the evolution and nature of multicellularity, and to neo-Darwinian understandings of evolutionary mechanisms. We show how these revisions lead to further complications for microbial classification and the philosophies of systematics and biodiversity. Incorporating microbial insights into the philosophy of biology will challenge many of its assumptions, but also give greater scope and depth to its investigations

Parental factors and adolescents' smoking behavior: an extension of the theory of planned behavior

Contains fulltext : 64005.pdf (publisher's version ) (Closed access)BACKGROUND: The aim of the present study is to investigate whether general parenting factors (i.e., quality parent-child relationship, psychological control, strict control, parental knowledge) and parental smoking add to The theory of planned behaviour [Organ Behav. Hum. Dec. 50 (1991) 179] in predicting the onset of smoking. A mediation model is applied in which parental factors affect smoking behavior indirectly by affecting smoking cognitions (i.e., attitude, self-efficacy, and social norm). METHODS: The model was tested in a longitudinal study on 1,070 adolescents, aged 10-14 years old. Structural equation models (SEM) on current and on future smoking behavior were tested. RESULTS: The findings showed that the quality of the parent-child relationship and parental knowledge affected adolescents' smoking behavior indirectly, while parental smoking behavior had a direct effect. Strict control and psychological control were found to be unrelated to adolescents' smoking onset. CONCLUSIONS: In prevention campaigns, parents should be informed of the extent to which they exert influence on their child's smoking behavior and should be given advice and information on how they can prevent their children from starting to smoke