When the substrates are bound to the enzyme it is called the?

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.

The smallest parts of these that retain their original properties are called

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic.