Popular nutrition Any of a number of weight-reduction diets that either eliminate one or more of the essential food groups, or recommend consumption of one type of food in excess at the expense of other foods; FDs rarely follow modern principles for losing weight. See Diet.
Early Modern Homo sapiens. All people today are classified as Homo sapiens. Our species of humans first began to evolve nearly 200,000 years ago in association with technologies not unlike those of the early Neandertals. It is now clear that early Homo sapiens, or modern humans, did not come after the Neandertals but were their contemporaries.
User: During which period did mammals first appear? a. Pleistocene b. Carboniferous c. Cretaceous d. JurassicWeegy: Mammals first appeared during Jurassic period. Expert answered|jin_jae_min|Points 408|User: Biomes on Earth have exhibited changes throughout history that have been caused by a variety of factors.