Abstract As part of the roundtable, “Ethics and Future Global Food System,” this essay discusses some major challenges we will face in feeding world 2050. A first challenge is nutritional: 690 million people (9 percent world's population) are currently undernourished, while 2.1 billion adults (28 overweight or obese. The current global food system insufficient ensuring that nutritious foods mak...

For almost a century, events relating to the evolutionary origin of endosperm, a unique embryo-nourishing tissue that is essential to the reproductive process in flowering plants, have remained a mystery. Integration of recent advances in phylogenetic reconstruction, comparative reproductive biology, and genetic theory can be used to elucidate the evolutionary events and forces associated with ...

Let N0 be the set of all non-negative integers and P(N0) be its power set. Then, an integer additive set-indexer (IASI) of a given graph G is defined as an injective function f : V (G) → P(N0) such that the induced edge-function f : E(G) → P(N0) defined by f(uv) = f(u) + f(v) is also injective, where f(u) + f(v) is the sumset of f(u) and f(v). An IASI f of G is said to be a strong IASI of G if ...