How can natural selection account for a the long snout of an anteater

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

Explain two reasons you think it is important for scientists to search for new ways to treat cancer

Give an example of a trait that is controlled by more than one gene.