AGROBIODIVERSITY IN CUCURBITA SPP. LANDRACES COLLECTED IN RIO DE JANEIRO ASSESSED BY MOLECULAR MARKERS


A new stage of demographic change: A warning for economists

The current stage of demographic changes in all countries that have experienced a demographic transition is characterized by two main features: (1) cessation valhalla axys of population growth; (2) a progressive increase in the total dependency ratio, which until recently, despite the long-run population ageing, was declining.Both of these features

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