Homo erectus<span> evolves in </span>Africa<span>. </span>Homo erectus<span> would bear a striking resemblance to modern humans, but had a brain about 74 percent of the size of modern man. Its forehead is less sloping than that of </span>Homo habilis<span> and the teeth are smaller. </span>Homo antecessor<span> may be a common ancestor of humans and Neanderthals.</span>]<span> At present estimate, humans have approximately 20,000–25,000 </span>genes<span> and share 99% of their </span>DNA<span> with the now extinct </span>Neanderthal [<span> and 95–99% of their </span>DNA<span> with their closest living evolutionary relative, the </span>chimpanzees.<span> The human variant of the </span>FOXP2<span> gene (linked to the control of speech) has been found to be identical in Neanderthals. </span>Homo heidelbergensis left footprints<span> in powdery volcanic ash solidified in </span>Italy<span>. </span>Homo heidelbergensis<span> may be a common ancestor of humans and Neanderthals.</span><span> It is morphologically very similar to </span>Homo erectus<span> but </span>Homo heidelbergensis<span> had a larger brain-case, about 93% the size of that of </span>Homo sapiens<span>. The </span>holotype<span> of the species was tall, 1.8 m (6 ft) and more muscular than modern humans.</span>
Three Adaptive features of aquatic plants (hydrophytes) are as follows: a) Underdeveloped conducting tissues (xylem and phloem) are present. b) The plants body covered with waxy substance. c) The stems are long, soft and spongy.
