What are three real-life examples of genetic engineering that are occurring right now?

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.

What noticeable trend from this graph might be used to make a conclusion?

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.