Which bases pair together? O Adenine & Guamine
O Cytosine & Guamine
O Thymine & Cytosine
O Uracil & Thymine

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.

Development has provided electrically for less money but what may be considered a cause of nuclear power

Which factor that affects biodiversity?