نتایج جستجو برای: isolation distanc
تعداد نتایج: 130938 فیلتر نتایج به سال:
Understanding the mechanisms shaping the spatiotemporal distribution of species has long been a central concern of ecology and evolutionary biology. Contemporary patterns of plant assemblies suggest that sexual interactions among species, i.e., reproductive interference, lead to the exclusive distributions of closely related species that share pollinators. However, the fitness consequences and ...
Available online 6 November 2012
A major goal of evolutionary biology is to identify the causes of diversification and to ascertain why some evolutionary lineages are especially diverse. Evolutionary biologists have long speculated that polyphenism--where a single genome produces alternative phenotypes in response to different environmental stimuli--facilitates speciation, especially when these alternative phenotypes differ in...
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The Chinese family policies are shaped by the country’s political, socioeconomic, and cultural contexts and have evolved over the years. China has passed its most significant family policies and laws in marriage; child rearing; child, women, and elderly protection; family planning; and health care in the past 60 years. This chapter will cover the most important laws and policies that affect Chi...
This research on the basic demographic processes and marital migrations of the population on Ugljan Island in the period from 1857 to 2001 was conducted within the context of the long-term anthropological research of the population structure of Croatia's islands. The analysis was based on the study of the origin of 5 244 married couples from Preko, Kali, Kukljica, Lukoran and Ugljan and carried...
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