The modern working definition of a gene is a portion (or sequence) of DNA that codes for a known cellular function or process (e.g. the function make melanin molecules). A single 'gene' is most similar to a single 'word' in the English language.The nucleotides (molecules) that make up genes can be seen as 'letters' in the English language. Nucleotides are named according to which of the four nitrogenous bases they contain. The four bases are cytosine, guanine, adenine, and thymine.he modern working definition of a gene is a portion (or sequence) of DNA that codes for a known cellular function or process (e.g. the function make melanin molecules). A single 'gene' is most similar to a single 'word' in the English language.
Where did humans first appear on Earth, and what were their society, technology, and culture? Humans first appeared on Earth during the Paleolithic Era, in the steppes and savannah of Africa, before migrating to Eurasia, the Americas, and Australia. These humans were hunter-foragers, changing their tools and culture to adapt to their surroundings. Describe earliest humans' technology & tools.
The first banking crisis. In West Africa, the Mali Empire was so rich, in 1324 its king caused inflation in Cairo by the amount of gold he took on his pilgrimage to Mecca. The powerful Songhay and Ashanti kingdoms also flourished in West Africa. Africa is thought to be the first continent on earth where humans lived. In Africaâs early history, groups were hunter-gatherers following a nomadic lifestyle. Small communities settled in fertile areas and began defending their local territory. From 1000AD onwards, larger African kingdoms formed.