The most abundant element in crusts continental crust (by weight) is?

a.) oxygen
b.) silicon
c.) calcium
d.) iron

What is the chance of two parents with blood types ab and o producing an offspring with blood type o a.0% b.25% c.75% d.50%

In "the pig," what is the main effect that the piglet initially has on kibuka?

Which of the following is not a technology that can be used to conserve resources? a. hydropower b. volcanic power c. natural gas d. geothermal select the best answer from the choices provided a b c d