At least 9 million people die because of hunger and malnutrition, sadly 5 million are children. In a world of plenty, a huge number go hungry. The biggest percentage of the people who go hungry live in the developing countries. Three-quarters of all the hungry people in the developing countries live in rural areas, mostly in the villages of Africa and Asia. Despite this worrying trend, food wastage in the developed countries is very high. For instance, in the United Kingdom, close 40% of food is never eaten, in U.S., 40-50% of all food ready to harvest is never ...
Essays on Ratchet
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Introduction
Genetic evolution refers to change(s) in inheritable traits occurring across succeeding generation of organisms. The change (evolution) is responsible for the diversity at all levels including the molecular level e.g. genetic variations, individual organisms in the same species (intra-species variations) and among species (interspecies variations). It is believed that all organisms emanated from common ancestry about 3.7 billion years ago and then evolved over time to the present biodiversity. Therefore all organisms have some shared traits at the morphological and molecular level with the species sharing a more recent ancestry having more similar traits. The process of evolution involves ...