The universe could be considered an isolated system because 1. Many people think that no energy or matter exists outside the universe
2. Energy and matter are created in the universe and flow freely into and out of the universe
3. Energy is created outside the universe and matter is created within the universe
4. Energy is created in the universe and matter is transferred out of the universe

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

Which of the following is a difference between active transport and facilitated diffusion? view available hint(s)which of the following is a difference between active transport and facilitated diffusion? facilitated diffusion can move solutes against a concentration gradient, and active transport cannot.active transport involves transport proteins, and facilitated diffusion does not.facilitated diffusion involves transport proteins, and active transport does not.active transport requires the expenditure of cellular energy, and facilitated diffusion does not.

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.