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.
  A:The first modern humans (Homo sapiens sapiens) appeared on earth around more than one hundred thousand years ago. They began to replace Neanderthal man (Homo sapiens neanderthalis or, more recently, Homo neanderthalis) in Europe around 50,000 years ago.ho they were and what they did represents a large field of study, pursued by Archaeologists, Anthropologists and Evolutionary Biologists. 1  According to Quran, Adam & Hawa were the first humans born on earth. 2  According to the Bible (Genesis Chapter 4), the first born person on earth was Cain, the child of Adam and Eve.