Fossils evidence shows that were the first photosynthetic organisms on earth, about 1.2 billion years ago.​

The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?

In figure 1-2 what is the distance from point b to point c?

Explain 3 specific difference or 3 specific similarities between chimpanzee and human behavior