doi:10.1111/j.1600-0471.1997.tb00150.xRICHARD H. SPOORJohn Wiley & Sons, Ltd.Arabian Archaeology & EpigraphySpoor R. Human population groups and the dis- tribution of lithic arrowheads in the Arabian Gulf. AAE 8: 1997: 143-160.Spoor, R. H. (1997). Human population groups and the ...
第三大节:Factors determine population growth(本章重点) 1)必须记住的若干重要概念: Demography the study of population crude birth rate the number of births in a year per thousand persons crude death rate the number of deaths in a year per thousand persons total fertility rate the number of chi...
As with many in the human population, I spend a great deal of time near the shores and coastlines. Now, many of my fellow wild creatures have asked me to communicate with you on a matter of great importance. We need your help. (第 ) 译文:让我先声明一下,我是一只鱼鹰。 和许多人类...
Identification of clonogenic common Flt3+ M-CSFR+ plasmacytoid and conventional dendritic cell progenitors in mouse bone marrow. Nat. Immunol. 8, 1207–1216 (2007). This work describes the CDP as a population giving rise to pDCs, cDC1s and cDC2s in vivo. Article CAS PubMed Google Scholar ...
population density31,33. The population density at which a species may occur in a particular environment is limited by the availability of trophic resources, which is directly dependent on NPP34. Since it is a well-known ecological rule that secondary consumers in natural communities have lower ...
1600-1650 | Life expectancy:43 years. What is the maximum human lifespan? The analysis of dynamics of the body mass in human population indicates extremums, which correspond to mean (70–75 years), the commonly accepted maximum (100–110 years) and maximum known(140–160 years)lifespan. ...
A severe decline in child births has occurred over the past half century, which will lead to considerable population declines, particularly in industrialized regions. A crucial question is whether this decline can be explained by economic and behavioural factors alone, as suggested by demographic repor...
The rate of growth of a population is proportional to the number present. if the population of a city doubled in the past 25 years, and the present population is 100000, when will the city have a population of 500000? [Given,loge5=1.609,loge2=0.6931. ] ...
Article: Incidence of human papillomavirus 6, 11, 16, 18 and 33 in normal oral mucosa of a Greek population
agriculture, and thus fostered new ways of life and population growth in these areas (Fig.1). These have not only shaped tropical economic systems but have also had profound evolutionary influences, shaping human genomes in areas where they grow, with repercussions to this day (Albuquerque et al...