In humans, gut flora synthesize folic acid from this molecule. One type of vector used to clone DNA fragments (100- to 300-kb insert size; average, 150 kb) in Escherichia coli cells (based on the phage P1 genome). The first, and most lengthy era of the Phanerozoic Eon.
The stage of Prophase I during which the two sister chromatids of each chromosome separate from each other. Crossing-over: Non-sister chromatids remain in contact throughout pachytene and a kind of localized breakage of the DNA occurs, which is followed by exchanges of DNA between them. Crossing over produces "cross-over chromatids," each composed of distinct blocks of DNA, some blocks derived from the mother, others from the father. A mammal belonging to the erstwhile taxonomic group Pachydermata (meaning "thick skinned ones"). A formerly existing continent, now broken up or fused with other continents due to the effects of rifting and continental drift. The Paleolithic was the first period of stone tool use.
The area contains essential elements that define the origin and evolution of humanity.
Fossils found there have enabled the identification of several specimens of early hominids, more particularly of Paranthropus, dating back between 4.5 million and 2.5 million years, as well as evidence of the domestication of fire 1.8 million to 1 million years ago.
A white crystalline organic compound (C₇H₇NO₂) composed of a benzene ring with an amino group and a carboxyl group attached to the carbon atoms 1 and 4, respectively. 1997, Semaw 2000), to the beginning of agriculture around 12,000 B. It deals primarily with the documentation of the the chronology of the history of life on earth — paleontologist /pale-ee-awn-TALL-ə-jəst, -jist/ Paleozoic Era /pale-ee-ə-ZŌ-ik/ n. A raised, red bump on the skin; the term is applied to any bump up to about the size of a pea.