Q: Answer the question

Materials must pass through a cell's semi-permeable membrane in order for energy to be utilized. This process is called

A: diffusion.

Q: Answer the question

Which technological advancement has done the most to improve the accuracy of weather predictions?

A: satellites

Q: Answer the question

Automobile engines built today are designed to be gas efficient. Gas-efficient engines most likely affect a city by reducing

A:
air pollution.