Which term refers to the process in which two gametes fuse to make one zygote?

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.

List charasteristics of athenosphere

Creating new things to solve problems and improve life depends on the close interaction of which two fields?