Download e-book for kindle: Belle Moral: A Natural History by Ann-Marie MacDonald

By Ann-Marie MacDonald

Following her father’s loss of life, novice scientist Pearl MacIsaac struggles to find the key of her family’s previous, which her father have been stored hidden with the aid of the family members health practitioner. Set in Scotland in 1899, this darkish and redemptive gothic comedy is a narrative of relations secrets and techniques that experience come to lifestyles and of the start and evolution of rules – and really a play of morals. achieving out in instructions to reconcile the extremes of rationalism and romanticism, Belle ethical embraces a posh variety of turn-of-the-century concept together with Charles Darwin’s idea of evolution, modern scientific ideals and the idea that of eugenics.

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Geographical area and the species diversity of human pathogens Perhaps more than any other ecological pattern, the species–area relationship has influenced the development of ecology. Smith and collaborators (2007) identified three distinct categories of species–area relationships for human diseases (Fig. 2). First, directly transmitted diseases, such as measles and pertussis, do not show a significant species–area relationship (Fig. 2). 2 Areal species richness diversity and surface area size (double-logarithmic transformations) for three categories of human pathogens: contagious diseases (black squares), zoonotic diseases (open triangles), and multihost diseases (black circles).

2000). Because persons homozygous for the sickle cell gene very rarely reproduce, the sickle cell allele (Hb S) should decline in every generation within populations and should therefore be observed only at very low frequencies if at all. This, however, is not the case everywhere. Sickle cell trait distribution High frequencies of more than 20% of the sickle cell trait are found in populations across a broad belt of tropical Africa (Allison 1954a,b) (Fig. 3). Elevated frequencies are also found in Greece, Turkey, and India (Singer 1953).

2005). Similarly, the fungal disease Coccidioides immitis probably appeared in South America within the past 10,000 years via human migrations (Fisher et al. 2001). Although current macroscopic patterns of disease distribution and occurrence cannot precisely mirror the situation of early human populations, the broad macroecological patterns of diseases discussed earlier are likely to have been similar. To summarize this section: large-scale humanpathogen interactions show two general spatial trends: (a) globally distributed pathogens selected throughout history as strains adapted to human populations, and (b) endemic pathogens, primarily zoonoses, whose species diversity is highest in the tropics.

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Belle Moral: A Natural History by Ann-Marie MacDonald


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