What separates homo sapiens from the herto man and the Balangoda Man?

This rapid change in species that rarely leaves behind fossil evidence is referred to as

Which of the following is most likely the result of an organism having lipids in its body a) water cannot be absorbed through the surface of a leaf b)human eats fruits to get a quick source of energy c) a sheep sleeps for more hours in the winter d) a warm river is filled with fish and algae

As water is cooled from 4 to 0, its density