2. a. A test conducted at the Oxford Radioactive Accelerator unit in England, modern and oldest human shared Europe for 5000 years. b. Modern human coexisted with them in Europe (Nearderthals inhabited) around 45,000 years ago. c. Hypothesis saying that H.sapiens may have introduced a new disease that contributed to the extinction of Neanderthals. 4. a. Modern human nuclear DNA is linked to the extinct Neanderthals. No Neanderthals mitochondrial DNA has been detected. b. Hypothesis saying that modern human femals interbreeded with males of Neanderthals to generate fertile offsprings. While progeny of female Neanderthals and modern human males were either rare, abscent or sterile. c. But some researchers saying that there are evidences of possible interbreeeding between femal Neanderthals and male modern human. d. H.erectus eventually evolved into H.heidelbergensis which in turn evolved into H.sapiens. 3. \"The science of sexual of appeal\" says that all primates including human instinctively behaves. In that genes are seeking highest levels. Solution 2. a. A test conducted at the Oxford Radioactive Accelerator unit in England, modern and oldest human shared Europe for 5000 years. b. Modern human coexisted with them in Europe (Nearderthals inhabited) around 45,000 years ago. c. Hypothesis saying that H.sapiens may have introduced a new disease that contributed to the extinction of Neanderthals. 4. a. Modern human nuclear DNA is linked to the extinct Neanderthals. No Neanderthals mitochondrial DNA has been detected. b. Hypothesis saying that modern human femals interbreeded with males of Neanderthals to generate fertile offsprings. While progeny of female Neanderthals and modern human males were either rare, abscent or sterile. c. But some researchers saying that there are evidences of possible interbreeeding between femal Neanderthals and male modern human. d. H.erectus eventually evolved into H.heidelbergensis which in turn evolved into H.sapiens. 3. \"The science of sexual of appeal\" says that all primates including human instinctively behaves. In that genes are seeking highest levels..